Correct quoting

Author: badboy

src/git/last-modification.md

@@ -3,7 +3,7 @@
 Shows the date of the last commit that modified this file:
 
 ```
-git log -1 --pretty="format:%ci path/to/file"
+git log -1 --pretty="format:%ci" path/to/file
 ```
 
 See `PRETTY FORMATS` in `git-log(1)` for all available formats.