[PATCH] doc: gitignore: clarify pattern base for info/exclude and core.excludesFile

[Shreyansh Paliwal <shreyanshpaliwalcmsmn@gmail.com>]

The pattern format section describes how patterns are interpreted
relative to the location of a .gitignore file, but does not mention
the behavior for exclude sources outside the working tree.

Clarify that patterns from $GIT_DIR/info/exclude and core.excludesFile
are treated as if they are specified at the root of the working tree,
so a leading '/' anchors matches at the repository root.

Reported-by: Dan Drake <dan@dandrake.org>
Signed-off-by: Shreyansh Paliwal <shreyanshpaliwalcmsmn@gmail.com>
---
 Documentation/gitignore.adoc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/gitignore.adoc b/Documentation/gitignore.adoc
index 9fccab4ae8..a3d24e5c34 100644
--- a/Documentation/gitignore.adoc
+++ b/Documentation/gitignore.adoc
@@ -96,6 +96,11 @@ PATTERN FORMAT
    particular `.gitignore` file itself. Otherwise the pattern may also
    match at any level below the `.gitignore` level.
 
+ - Patterns read from exclude sources that are outside the working tree,
+   such as $GIT_DIR/info/exclude and core.excludesFile, are treated as if
+   they are specified at the root of the working tree, i.e. a leading "/"
+   in such patterns anchors the match at the root of the repository.
+
  - If there is a separator at the end of the pattern then the pattern
    will only match directories, otherwise the pattern can match both
    files and directories.
-- 
2.53.0