slicker sometimes uses wrongly uses full-names inside comments

[csilvers]

I had code like this:

CONST = False

def foo():
    """Do something whenever CONST is True."""

I then moved both CONST and foo() to a new file via slicker.py file.CONST file.foo newfile.py and the docstring then said: """Do something whenever newfile.CONST is True."""

This isn't wrong per se, but it should be saying "Do something whenever CONST is True."

To reproduce in webapp, checkout d8e31c746e and then run:
../slicker/slicker.py content_render.video_handlers.{TALK_TO_BIGQUERY,_FIELD_NAMES,get_translation_table,get_translation_table_csv} content/videos/translation_table.py
The docstring in get_translation_table() will say "Note: if content.videos.translation_table.TALK_TO_BIGQUERY is false ..."