Merge branch 'rt/align-add-i-help-text'

Doc update.

* rt/align-add-i-help-text:
  git add -i: replace \t with blanks in the help message

git-add--interactive.perl

@@ -1678,7 +1678,7 @@ status        - show paths with changes
 update        - add working tree state to the staged set of changes
 revert        - revert staged set of changes back to the HEAD version
 patch         - pick hunks and update selectively
-diff	      - view diff between HEAD and index
+diff          - view diff between HEAD and index
 add untracked - add contents of untracked files to the staged set of changes
 EOF
 }