howto/maintain: document "### match next" convention in jch/pu branch

diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index 462b79c120ddb132bd125104240a488cc31f877b..ba02d4de5901b4448411654ecdf76a1b1980e53b 100644 (file)
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -66,6 +66,11 @@ is from the path in question, the lower its precedence). Finally
 global and system-wide files are considered (they have the lowest
 precedence).
 
+When the `.gitattributes` file is missing from the work tree, the
+path in the index is used as a fall-back.  During checkout process,
+`.gitattributes` in the index is used and then the file in the
+working tree is used as a fall-back.
+
 If you wish to affect only a single repository (i.e., to assign
 attributes to files that are particular to
 one user's workflow for that repository), then
@@ -511,6 +516,8 @@ configuration file (you still need to enable this with the
 attribute mechanism, via `.gitattributes`).  The following built in
 patterns are available:
 
+- `ada` suitable for source code in the Ada language.
+
 - `bibtex` suitable for files with BibTeX coded references.
 
 - `cpp` suitable for source code in the C and C++ languages.