user-manual: use pithier example commit

diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index d0a2ad30884e2d7d148474d49030db5a7820bc29..7757abe62190a066b6ad8b57214b70ff3fa0f12a 100644 (file)
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -190,6 +190,13 @@ blobs contained in a commit.
   and dereference the tag recursively until a non-tag object is
   found.
 
+* A colon, followed by a slash, followed by a text: this names
+  a commit whose commit message starts with the specified text.
+  This name returns the youngest matching commit which is
+  reachable from any ref.  If the commit message starts with a
+  '!', you have to repeat that;  the special sequence ':/!',
+  followed by something else than '!' is reserved for now.
+
 * A suffix ':' followed by a path; this names the blob or tree
   at the given path in the tree-ish object named by the part
   before the colon.
@@ -248,7 +255,7 @@ reachable from `r1` from the set of commits reachable from
 A similar notation "`r1\...r2`" is called symmetric difference
 of `r1` and `r2` and is defined as
 "`r1 r2 --not $(git-merge-base --all r1 r2)`".
-It it the set of commits that are reachable from either one of
+It is the set of commits that are reachable from either one of
 `r1` or `r2` but not from both.
 
 Two other shorthands for naming a set that is formed by a commit