editorconfig: fix style not applying to subdirs anymore

In 046e111 (templates: add .gitattributes entry for sample hooks,
2026-02-13) we have added another pattern to our EditorConfig that sets
the style for our hook templates. As our templates are located in
"templates/hooks/", we explicitly specify that subdirectory as part of
the globbing pattern.

This change causes files in other subdirectories, like for example
"builtin/add.c", to not be configured properly anymore. This seems to
stem from a subtlety in the EditorConfig specification [1]:

  If the glob contains a path separator (a / not inside square
  brackets), then the glob is relative to the directory level of the
  particular .editorconfig file itself. Otherwise the pattern may also
  match at any level below the .editorconfig level.

What's interesting is that the _whole_ expression is considered to be
the glob. So when the expression used is for example "{*.c,foo/*.h}",
then it will be considered a single glob, and because it contains a path
separator we will now anchor "*.c" matches to the same directory as the
".editorconfig" file.

Fix this issue by splitting out the configuration for hook templates
into a separate section. It leads to a tiny bit of duplication, but the
alternative would be something like the following (note the "{,**/}"):

  [{{,**/}*.{c,h,sh,bash,perl,pl,pm,txt,adoc},config.mak.*,{,**/}Makefile,templates/hooks/*.sample}]
  indent_style = tab
  tab_width = 8

This starts to become somewhat hard to read, so the duplication feels
like the better tradeoff.

[1]: https://spec.editorconfig.org/#glob-expressions

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Acked-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: pks-t

.editorconfig

@@ -4,7 +4,11 @@ insert_final_newline = true
 
 # The settings for C (*.c and *.h) files are mirrored in .clang-format.  Keep
 # them in sync.
-[{*.{c,h,sh,bash,perl,pl,pm,txt,adoc},config.mak.*,Makefile,templates/hooks/*.sample}]
+[{*.{c,h,sh,bash,perl,pl,pm,txt,adoc},config.mak.*,Makefile}]
+indent_style = tab
+tab_width = 8
+
+[templates/hooks/*.sample]
 indent_style = tab
 tab_width = 8