ANSI escape codes removed/unescaped

[lllama]

Before

"""Prints things in bold."""
s = "wot?"
print("\033[1m{0}\033[0m".format(s))

After:

"""Prints things in bold."""
s = "wot?"
print(f"{s}")

Looks like it actually writes the escape codes back as escaped text in the files. This is what it now looks like in vim:

When I run the script then the output is the same, but for editing purposes, keeping the original would be ideal.

[ikamensh]

Hi, thanks for the bug report!

This is likely to share root cause with #55 - might take some time before this is solved.

[akx]

This seems to be a bug in astor, actually.

I think I may have a fix...