revert(3p/git): Revert merge of git upstream at v2.26.2

This causes cgit to serve error pages, which is undesirable.

This reverts commit 5229c9b232, reversing
changes made to f2b211131f.

third_party/git/Documentation/git-check-ignore.txt

@@ -30,22 +30,16 @@ OPTIONS
 	valid with a single pathname.
 
 -v, --verbose::
-	Instead of printing the paths that are excluded, for each path
-	that matches an exclude pattern, print the exclude pattern
-	together with the path.  (Matching an exclude pattern usually
-	means the path is excluded, but if the pattern begins with '!'
-	then it is a negated pattern and matching it means the path is
-	NOT excluded.)
-+
-For precedence rules within and between exclude sources, see
-linkgit:gitignore[5].
+	Also output details about the matching pattern (if any)
+	for each given pathname. For precedence rules within and
+	between exclude sources, see linkgit:gitignore[5].
 
 --stdin::
 	Read pathnames from the standard input, one per line,
 	instead of from the command-line.
 
 -z::
-	The output format is modified to be machine-parsable (see
+	The output format is modified to be machine-parseable (see
 	below).  If `--stdin` is also given, input paths are separated
 	with a NUL character instead of a linefeed character.