Backspace in a line's leading blanks goes back to the previous indent stop

helix's delete_char_backward dedents: when everything before the cursor on its
line is blank, it deletes back to the previous multiple of the indent width,
a whole unit when already on one (a tab before the cursor still goes alone).
pardes deleted one space, so O<backspace> under an indented line left three
of four, which is where helix-golf's function_into_class ended up.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/test/hxcases/cases.jsonl b/test/hxcases/cases.jsonl
index 471d3a6c..cfd82cce 100644
--- a/test/hxcases/cases.jsonl
+++ b/test/hxcases/cases.jsonl
@@ -355,6 +355,11 @@
 {"name": "ins-enter-indent", "pane": "file", "text": "    foo\n", "keys": "A<ret>x<esc>"}
 {"name": "ins-backspace", "pane": "file", "text": "abc\n", "keys": "lli<backspace><esc>"}
 {"name": "ins-backspace-join", "pane": "file", "text": "ab\ncd\n", "keys": "ji<backspace><esc>"}
+{"name": "ins-backspace-indent-unit", "pane": "file", "text": "        x\n", "keys": "8li<backspace>"}
+{"name": "ins-backspace-indent-partial", "pane": "file", "text": "      x\n", "keys": "6li<backspace>"}
+{"name": "ins-backspace-indent-tab", "pane": "file", "text": "\t\tx\n", "keys": "2li<backspace>"}
+{"name": "ins-backspace-open-indent", "pane": "file", "text": "    ab\n", "keys": "O<backspace>"}
+{"name": "ins-backspace-after-text", "pane": "file", "text": "  a    x\n", "keys": "7li<backspace>"}
 {"name": "ins-ctrl-w", "pane": "file", "text": "one two\n", "keys": "A<C-w><esc>"}
 {"name": "ins-ctrl-w-col0-join", "pane": "file", "text": "ab\ncd\n", "keys": "ji<C-w><esc>"}
 {"name": "ins-alt-bs", "pane": "file", "text": "one two\n", "keys": "A<A-backspace><esc>"}