t1510: fix typo in the comment of a test

diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index 4a27643c1ea0e908a0a54b84f668d5a80f6d7100..ff23cb0219d602803a83da273195fcc4ca71b5f5 100644 (file)
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -136,7 +136,12 @@ appending `/{asterisk}`.
        directory (typically a sequence of "../", or an empty string).
 
 --git-dir::
-       Show `$GIT_DIR` if defined else show the path to the .git directory.
+       Show `$GIT_DIR` if defined. Otherwise show the path to
+       the .git directory, relative to the current directory.
++
+If `$GIT_DIR` is not defined and the current directory
+is not detected to lie in a git repository or work tree
+print a message to stderr and exit with nonzero status.
 
 --is-inside-git-dir::
        When the current working directory is below the repository