Refactor: add missing or_directory where needed.

This commit adds the missing `_or_directory` to any example which is
specifying an action affecting a file or a directory, but uses the
token `{{path/to/file}}` instead of `{{path/to/file_or_directory}}`.

pages/common/git-log.md

@@ -9,7 +9,7 @@
 
 - Show the history of a particular file or directory, including differences:
 
-`git log -p {{path}}`
+`git log -p {{path/to/file_or_directory}}`
 
 - Show only the first line of each commit message: