"Log of Selection" only works when more than one line is selected

1. Open a file which is checked in to a git repository.
2. In that file, select an entire line, front to back.
3. From the menu, select "Tools" -> "Git" -> "Current File" -> "Log of <filename> Selection".
   Nothing happens.

To make this work, the selection needs to begin and end in different lines. This is surprising to me. I understand that git can only handle lines and not single words, but I think that selecting an entire line should be sufficient, also when that doesn't include a line break.