grit check mistakenly suggests to the user there's a rewrite available when there isn't

[collinc777]

Example rule:

`print("hello world")`

grit check
./somefilepath.py
  39:1    match  hello world not allowed.    hello_world_rule
  
 1 files with rewrites. Run grit check --fix to apply changes.

then grit check --fix doesn't do anything although it says (1 File fixed)