| diff --git a/Documentation/diff-format.txt b/Documentation/diff-format.txt | |
| index b426a14..97756ec 100644 | |
| --- a/Documentation/diff-format.txt | |
| +++ b/Documentation/diff-format.txt | |
| @@ -81,7 +81,7 @@ The "diff" formatting options can be customized via the | |
| environment variable 'GIT_DIFF_OPTS'. For example, if you | |
| prefer context diff: | |
| - GIT_DIFF_OPTS=-c git-diff-index -p $(cat .git/HEAD) | |
| + GIT_DIFF_OPTS=-c git-diff-index -p HEAD | |
| 2. When the environment variable 'GIT_EXTERNAL_DIFF' is set, the |