Commit help_sections data file

The help_sections.rs file was added to the tarball only as a quick hack.
There is a cyclic dependency between docs and fish:

"fish_indent" via "crates/build-man-pages" depends on "doc_src/".
So every "touch doc_src/foo.rst && ninja -Cbuild sphinx-docs"
re-builds fish.

In future "fish_indent" should not depend on "crates/build-man-pages".
Until then, a following commit wants to break this cyclic dependency
in a different way: we won't embed man pages (matching historical
behavior), which means that CMake builds won't need to run
sphinx-build.

But sphinx-build is also used for extracting help sections.

Also, the fix for #12082 will use help sections elsewhere in the code.

Prepare to remove the dependency on doc_src by committing the help
sections (we already do elsewhere).

build_tools/make_tarball.sh

@@ -68,13 +68,12 @@ echo "$VERSION" > version
 cmake -G "$BUILD_GENERATOR" -DCMAKE_BUILD_TYPE=Debug "$wd"
 mkdir $PWD/user_doc/src
 FISH_SPHINX_BUILD_DATE=$tag_creation_date \
-FISH_SPHINX_HELP_SECTIONS_OUTPUT=$PWD/user_doc/src/help_sections.rs \
-    $BUILD_TOOL doc
+$BUILD_TOOL doc
 
 TAR_APPEND="$TAR --append --file=$path --mtime=now --owner=0 --group=0 \
     --mode=g+w,a+rX --transform s/^/$prefix\//"
 $TAR_APPEND --no-recursion user_doc
-$TAR_APPEND user_doc/html user_doc/man user_doc/src/help_sections.rs
+$TAR_APPEND user_doc/html user_doc/man
 $TAR_APPEND version
 
 cd -