A right click on a diff line opens the place it names: its file, the hunk's new line, the line itself

In a diff pane (a .diff/.patch file, or a command pane's diff output), the
look's own expansion, which its hover shows, takes a whole line for a
`diff --git`, `---`, `+++` or `@@` line wherever the pointer is on it,
markers included, and for a hunk line when the pointer is on its `+`, `-`
or space. Then the look opens the file (a/ b/ dropped, timestamps cut) at
the line from the hunk header and the lines above it: `@@` the hunk's
first new line, context and added lines their own, a removed line the new
line now where it was. `diff --git` and `+++` open the new file; `---` the
old one, unless the `+++` under it names another. On a hunk line's code
the expansion is its words, the prefix never one of them, and looks as
ever. Other panes are untouched.

Paths resolve in the repository (walking up to `.git` or `.jj` from the
diff's directory, or a command pane's), then that directory. A file not
here opens nothing and says `Look: b/x: no such file here`, or `deleted by
this diff`. A 9P look writing a whole line of the diff does the same.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/src/CHANGELOG.md b/src/CHANGELOG.md
index 5f53ff8a..d6b4846b 100644
--- a/src/CHANGELOG.md
+++ b/src/CHANGELOG.md
@@ -7,6 +7,10 @@
   file's language, its old and new side each parsed whole, and tint added
   and removed rows to the pane's edge with their `+`/`-` in the tint's hue.
   Only the hunks in view are parsed, once each.
+- A right click on a diff's `+++`/`---`/`diff --git` line opens its file,
+  on a `@@` line the new file at the hunk, and on a hunk line's `+`, `-` or
+  space the new file at that line (a removed line: where it was). Paths are
+  the repository's; a file not here says so and opens nothing.
 
 ## 0.0.8