host: the core owns the event loop; every platform becomes a vtable of optional methods

1 files changed, 68 insertions, 68 deletions

diff --git a/test/snapshots/jumps.golden b/test/snapshots/jumps.golden
index d517677a..fde7b495 100644
--- a/test/snapshots/jumps.golden
+++ b/test/snapshots/jumps.golden
@@ -1,6 +1,6 @@
 == snap start grid=150x30 cursor=7,2
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt                                                                                  Save New Del
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt                                                                           Save New Newtty Del
 |     1 line 1
 |     2 line 2
 |     3 line 3
@@ -30,8 +30,8 @@
 |    27 line 27
 |    28 line 28
 == snap to-shell grid=150x30 cursor=79,4
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |     1 line 1                                                                ls
 |     2 line 2                                                                big.txt
 |     3 line 3
@@ -61,8 +61,8 @@
 |    27 line 27
 |    28 line 28
 == snap to-file grid=150x30 cursor=7,2
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |     1 line 1                                                                ls
 |     2 line 2                                                                big.txt
 |     3 line 3
@@ -92,8 +92,8 @@
 |    27 line 27
 |    28 line 28
 == snap goto-100 grid=150x30 cursor=7,26
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    76 line 76                                                               ls
 |    77 line 77                                                               big.txt
 |    78 line 78
@@ -123,8 +123,8 @@
 |   102 line 102
 |   103 line 103
 == snap back-in-file grid=150x30 cursor=7,2
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |     1 line 1                                                                ls
 |     2 line 2                                                                big.txt
 |     3 line 3
@@ -154,8 +154,8 @@
 |    27 line 27
 |    28 line 28
 == snap back-to-shell grid=150x30 cursor=79,4
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |     1 line 1                                                                ls
 |     2 line 2                                                                big.txt
 |     3 line 3
@@ -185,8 +185,8 @@
 |    27 line 27
 |    28 line 28
 == snap forward-file grid=150x30 cursor=7,2
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |     1 line 1                                                                ls
 |     2 line 2                                                                big.txt
 |     3 line 3
@@ -216,8 +216,8 @@
 |    27 line 27
 |    28 line 28
 == snap forward-100 grid=150x30 cursor=7,16
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    86 line 86                                                               ls
 |    87 line 87                                                               big.txt
 |    88 line 88
@@ -247,8 +247,8 @@
 |   112 line 112
 |   113 line 113
 == snap last grid=150x30 cursor=79,4
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    86 line 86                                                               ls
 |    87 line 87                                                               big.txt
 |    88 line 88
@@ -278,8 +278,8 @@
 |   112 line 112
 |   113 line 113
 == snap last-back grid=150x30 cursor=7,16
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    86 line 86                                                               ls
 |    87 line 87                                                               big.txt
 |    88 line 88
@@ -309,8 +309,8 @@
 |   112 line 112
 |   113 line 113
 == snap jumplist grid=150x30 cursor=7,16
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    86 line 86                                                               ls
 |    87 line 87                                                               big.txt
 |    88 line 88
@@ -334,14 +334,14 @@
 |   106 line 106
 |   107 line 107
 |   108 line 108
-|  /tmp/pardes-snap/jumps/cwd/+Jumps             New Del
+|  /tmp/pardes-snap/jumps/cwd/+Jumps       New Newtty Del
 |     1 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     2 /tmp/pardes-snap/jumps/cwd/big.txt:1:1 line 1
 |     3 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     4 /tmp/pardes-snap/jumps/cwd/big.txt:100:1 line 100
 == snap step1-shell grid=150x30 cursor=79,4
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    86 line 86                                                               ls
 |    87 line 87                                                               big.txt
 |    88 line 88
@@ -365,45 +365,45 @@
 |   106 line 106
 |   107 line 107
 |   108 line 108
-|  /tmp/pardes-snap/jumps/cwd/+Jumps             New Del
+|  /tmp/pardes-snap/jumps/cwd/+Jumps       New Newtty Del
 |     1 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     2 /tmp/pardes-snap/jumps/cwd/big.txt:1:1 line 1
 |     3 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     4 /tmp/pardes-snap/jumps/cwd/big.txt:100:1 line 100
 == style step1-shell
-|0: 0-56 #949494,#121212, 57-149 d,#121212,
-|1: 0-1 #ffffff,#262626, 2-54 #949494,#121212, 55-74 d,#121212, 75-76 #ffffff,#626262, 77-129 #949494,#121212, 130-149 d,#121212,
-|2: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|3: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|4: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|5: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|6: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|7: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|8: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|9: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|10: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|11: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|12: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|13: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|14: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|15: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|16: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|17: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|18: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|19: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|20: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|21: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|22: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|23: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|24: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|25: 0-1 #ffffff,#262626, 2-54 #949494,#121212, 55-74 d,#121212, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|26: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-40 #bdbdbd,#080808, 41-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|27: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-51 #bdbdbd,#080808, 52-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|28: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-40 #bdbdbd,#080808, 41-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
-|29: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-55 #bdbdbd,#080808, 56-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-149 #bdbdbd,#080808,
+|0: 0-74 #949494,#121212, 75-149 d,#121212,
+|1: 0-1 #ffffff,#262626, 2-55 #949494,#121212, 56-74 d,#121212, 75-76 #ffffff,#626262, 77-129 #949494,#121212, 130-149 d,#121212,
+|2: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-78 #bdbdbd,#080808, 79-149 d,#080808,
+|3: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-76 d,#080808, 77-83 #bdbdbd,#080808, 84-149 d,#080808,
+|4: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|5: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|6: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|7: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|8: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|9: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|10: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|11: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|12: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|13: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|14: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|15: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-13 #bdbdbd,#080808, 14-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|16: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|17: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|18: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|19: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|20: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|21: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|22: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|23: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|24: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-14 #bdbdbd,#080808, 15-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|25: 0-1 #ffffff,#262626, 2-55 #949494,#121212, 56-74 d,#121212, 75-75 d,#444444, 76-149 d,#080808,
+|26: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-40 #bdbdbd,#080808, 41-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|27: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-51 #bdbdbd,#080808, 52-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|28: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-40 #bdbdbd,#080808, 41-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
+|29: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-55 #bdbdbd,#080808, 56-74 d,#080808, 75-75 d,#444444, 76-149 d,#080808,
 == snap step2-file grid=150x30 cursor=7,2
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |     1 line 1                                                                ls
 |     2 line 2                                                                big.txt
 |     3 line 3
@@ -427,14 +427,14 @@
 |    21 line 21
 |    22 line 22
 |    23 line 23
-|  /tmp/pardes-snap/jumps/cwd/+Jumps             New Del
+|  /tmp/pardes-snap/jumps/cwd/+Jumps       New Newtty Del
 |     1 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     2 /tmp/pardes-snap/jumps/cwd/big.txt:1:1 line 1
 |     3 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     4 /tmp/pardes-snap/jumps/cwd/big.txt:100:1 line 100
 == snap step4-line100 grid=150x30 cursor=7,13
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    89 line 89                                                               ls
 |    90 line 90                                                               big.txt
 |    91 line 91
@@ -458,14 +458,14 @@
 |   109 line 109
 |   110 line 110
 |   111 line 111
-|  /tmp/pardes-snap/jumps/cwd/+Jumps             New Del
+|  /tmp/pardes-snap/jumps/cwd/+Jumps       New Newtty Del
 |     2 /tmp/pardes-snap/jumps/cwd/big.txt:1:1 line 1
 |     3 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     4 /tmp/pardes-snap/jumps/cwd/big.txt:100:1 line 100
 |     5
 == snap step-back grid=150x30 cursor=79,4
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    89 line 89                                                               ls
 |    90 line 90                                                               big.txt
 |    91 line 91
@@ -489,14 +489,14 @@
 |   109 line 109
 |   110 line 110
 |   111 line 111
-|  /tmp/pardes-snap/jumps/cwd/+Jumps             New Del
+|  /tmp/pardes-snap/jumps/cwd/+Jumps       New Newtty Del
 |     2 /tmp/pardes-snap/jumps/cwd/big.txt:1:1 line 1
 |     3 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     4 /tmp/pardes-snap/jumps/cwd/big.txt:100:1 line 100
 |     5
 == snap look-row grid=150x30 cursor=7,13
-|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
-|  /tmp/pardes-snap/jumps/cwd/big.txt       Save New Del                      /tmp/pardes-snap/jumps/cwd             New Del Filter
+|New Newcol Joincol Find Grep Help Changelog Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/jumps/cwd/big.txt Save New Newtty Del                     /tmp/pardes-snap/jumps/cwd      New Newtty Del Filter
 |    89 line 89                                                               ls
 |    90 line 90                                                               big.txt
 |    91 line 91
@@ -520,7 +520,7 @@
 |   109 line 109
 |   110 line 110
 |   111 line 111
-|  /tmp/pardes-snap/jumps/cwd/+Jumps             New Del
+|  /tmp/pardes-snap/jumps/cwd/+Jumps       New Newtty Del
 |     2 /tmp/pardes-snap/jumps/cwd/big.txt:1:1 line 1
 |     3 @p1:3:3 /tmp/pardes-snap/jumps/cwd
 |     4 /tmp/pardes-snap/jumps/cwd/big.txt:100:1 line 100