Fix and clarify cases in ignore patterns

[DanielYang59]

Follow up #3580 (comment).

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Question:

• What does the "dictionary_names.txt" dictionary do? I didn't see any description in README.rst but looks like it's a global ignore dict instead of a correction dict (i.e. any pattern in this dict would be ignore?).

  codespell/codespell_lib/_codespell.py

  Lines 119 to 120 in 07a4645

  	"names",
  	"for valid proper names that might be typos",

  liszt = 1  # no error
  Liszt = 1  # no error
  
  wrod = 2  # wrod ==> word

[DimitriPapadopoulos]

dictionary_names.txt is the same as other dictionaries: it contains potential typos with corrections.

In this case, the potential typos are valid proper nouns (names).

[DanielYang59]

Hi @DimitriPapadopoulos thanks for your comment.

it contains potential typos with corrections.
In this case, the potential typos are valid proper nouns (names).

I still don't really understand the behaviour, should I expect a word in my target file like Liszt to be marked as typo or not? In my case codespell doesn't seem to flag Liszt as typo, if so why do we need this dictionary? For optional functionality maybe?

[DimitriPapadopoulos]

This dictionary is not part of the default dictionaries.

[DanielYang59]

okay thanks for the reply