Tab after text leaves the syntax node in insert mode; Shift-Tab indents

helix smart_tab: in insert mode, Tab where text precedes the cursor on its
line moves past the end of the node the cursor is in, the parent-node end of
Alt-e; in leading blanks it indents. Only where the file has a grammar: the
reference pins smart tab off, which a file without a grammar agrees with, so
there Tab still indents. Shift-Tab is insert_tab, and the differential
harness now reads the S- modifier.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

2 files changed, 4 insertions, 0 deletions

diff --git a/test/hxcases/cases.jsonl b/test/hxcases/cases.jsonl
index 15e53590..f589755a 100644
--- a/test/hxcases/cases.jsonl
+++ b/test/hxcases/cases.jsonl
@@ -452,6 +452,8 @@
 {"name": "ins-checkpoint-undo-twice", "pane": "file", "text": "ab\n", "keys": "iX<C-s>Y<esc>uu"}
 {"name": "ins-checkpoint-redo", "pane": "file", "text": "ab\n", "keys": "iX<C-s>Y<esc>uuU"}
 {"name": "msel-ins-checkpoint", "pane": "file", "text": "ab\nab\n", "keys": "CiX<C-s>Y<esc>u"}
+{"name": "ins-tab-after-text-plain", "pane": "file", "text": "ab cd\n", "keys": "2li<tab>X<esc>"}
+{"name": "ins-shift-tab", "pane": "file", "text": "ab cd\n", "keys": "2li<S-tab>X<esc>"}
 {"name": "msel-align-basic", "pane": "file", "text": "a=1\nbbb=2\n", "keys": "%s=<ret>&"}
 {"name": "msel-align-columns", "pane": "file", "text": "a,b,c\nccc,d,e\n", "keys": "%s,<ret>&"}
 {"name": "msel-align-uneven", "pane": "file", "text": "a,b\nccc,d,eee,f\n", "keys": "%s,<ret>&"}
diff --git a/test/hxcases/goldens.jsonl b/test/hxcases/goldens.jsonl
index 7a195980..ce1b461c 100644
--- a/test/hxcases/goldens.jsonl
+++ b/test/hxcases/goldens.jsonl
@@ -452,6 +452,8 @@
 {"name":"ins-checkpoint-undo-twice","text":"ab\n","mode":"normal","cursor":{"row":0,"col":0},"anchor":{"row":0,"col":0}}
 {"name":"ins-checkpoint-redo","text":"Xab\n","mode":"normal","cursor":{"row":0,"col":1},"anchor":{"row":0,"col":1}}
 {"name":"msel-ins-checkpoint","text":"Xab\nXab\n","mode":"normal","cursor":{"row":1,"col":1},"anchor":{"row":1,"col":1},"sels":[{"cursor":{"row":0,"col":1},"anchor":{"row":0,"col":1}},{"cursor":{"row":1,"col":1},"anchor":{"row":1,"col":1}}],"primary":1}
+{"name":"ins-tab-after-text-plain","text":"ab  X cd\n","mode":"normal","cursor":{"row":0,"col":5},"anchor":{"row":0,"col":5}}
+{"name":"ins-shift-tab","text":"ab  X cd\n","mode":"normal","cursor":{"row":0,"col":5},"anchor":{"row":0,"col":5}}
 {"name":"msel-align-basic","text":"a  =1\nbbb=2\n","mode":"normal","cursor":{"row":0,"col":3},"anchor":{"row":0,"col":3},"sels":[{"cursor":{"row":0,"col":3},"anchor":{"row":0,"col":3}},{"cursor":{"row":1,"col":3},"anchor":{"row":1,"col":3}}],"primary":0}
 {"name":"msel-align-columns","text":"a  ,b,c\nccc,d,e\n","mode":"normal","cursor":{"row":0,"col":3},"anchor":{"row":0,"col":3},"sels":[{"cursor":{"row":0,"col":3},"anchor":{"row":0,"col":3}},{"cursor":{"row":0,"col":5},"anchor":{"row":0,"col":5}},{"cursor":{"row":1,"col":3},"anchor":{"row":1,"col":3}},{"cursor":{"row":1,"col":5},"anchor":{"row":1,"col":5}}],"primary":0}
 {"name":"msel-align-uneven","text":"a  ,b\nccc,d,eee,f\n","mode":"normal","cursor":{"row":0,"col":3},"anchor":{"row":0,"col":3},"sels":[{"cursor":{"row":0,"col":3},"anchor":{"row":0,"col":3}},{"cursor":{"row":1,"col":3},"anchor":{"row":1,"col":3}},{"cursor":{"row":1,"col":5},"anchor":{"row":1,"col":5}},{"cursor":{"row":1,"col":9},"anchor":{"row":1,"col":9}}],"primary":0}