checkout: convert to use parse_pathspec

diff --git a/Documentation/git-describe.txt b/Documentation/git-describe.txt
index 711040d2f1b8537623f633c3d0207ef4e27e1877..9439cd6d56b0d3aa2115b9843936b449b6765652 100644 (file)
--- a/Documentation/git-describe.txt
+++ b/Documentation/git-describe.txt
@@ -88,6 +88,11 @@ OPTIONS
 --always::
        Show uniquely abbreviated commit object as fallback.
 
+--first-parent::
+       Follow only the first parent commit upon seeing a merge commit.
+       This is useful when you wish to not match tags on branches merged
+       in the history of the target commit.
+
 EXAMPLES
 --------
 
@@ -132,7 +137,7 @@ closest tagname without any suffix:
 
 Note that the suffix you get if you type these commands today may be
 longer than what Linus saw above when he ran these commands, as your
-git repository may have new commits whose object names begin with
+Git repository may have new commits whose object names begin with
 975b that did not exist back then, and "-g975b" suffix alone may not
 be sufficient to disambiguate these commits.
 
@@ -149,7 +154,9 @@ is found, its name will be output and searching will stop.
 If an exact match was not found, 'git describe' will walk back
 through the commit history to locate an ancestor commit which
 has been tagged.  The ancestor's tag will be output along with an
-abbreviation of the input committish's SHA1.
+abbreviation of the input committish's SHA-1. If '--first-parent' was
+specified then the walk will only consider the first parent of each
+commit.
 
 If multiple tags were found during the walk then the tag which
 has the fewest commits different from the input committish will be