Add check for variable name or non word that should be inside quote

[Pierre-Sassoulas]

Syntax checkers do not like variable name inside sentences. Humans can manage, but it's still harder to read. So string like this:
should be inside quote:

def func(named_parameter: str, other, word) -> None:
    """named_parameter should have a nice name

    Other information here, if there's no underscore in it it's a normal word.
    """
    print(named_parameter)

-    """named_parameter should have a nice name
+    """'named_parameter' should have a nice name

[DanielNoord]

👍

As I said in this #8 (comment) I do think this should be optional though as there is no basis in any of the PEP's and I think those should be the guidelines for the tool's standard behaviour.

Something like --quote-argument-names.