Tags: patch


In completion--do-completion, check if completion-try-completion
moved point out of the old completion boundaries.  If that
happened, then we did non-trivial completion even if the string
is otherwise unchanged.

For example,
~/src/emacs/trunk/lisp|/progmodes/project.el
hitting TAB moves us to:
~/src/emacs/trunk/lisp/|progmodes/project.el
then hitting TAB again moves us to
~/src/emacs/trunk/lisp/progmodes/|project.el

Both of these completions are successful, but we previously ran
code for completion failure (the t branch of the cond in
completion--do-completion) in the second case.  In particular,
we would always run minibuffer-completion-help, ignoring the
specific value of completion-auto-help which controls whether or
not to run minibuffer-completion-help.  Now we correctly run
code for successful completion for both cases.

We also always have checked that we're in the same boundaries
before doing completion cycling; that check is now more
accurate.

In GNU Emacs 30.1.90 (build 4, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.15.12, Xaw scroll bars) of 2025-08-14 built on
 igm-qws-u22796a
Repository revision: c7ee7707212c0b7c2892d2d9da039375f624799c
Repository branch: HEAD
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Rocky Linux 8.10 (Green Obsidian)

Configured using:
 'configure --with-x-toolkit=lucid --without-gpm --without-gconf
 --without-selinux --without-imagemagick --with-modules --with-gif=no
 --with-cairo --with-rsvg --without-compress-install --with-tree-sitter
 --with-native-compilation=aot
 PKG_CONFIG_PATH=/usr/local/home/garnish/libtree-sitter/0.22.6-1/lib/pkgconfig/'