Fix syntax error in completion file

[Kemboiray]

A syntax error in the file caused the following output when trying to trigger completions in zsh (pressing TAB):

$ fastfetch    File "<stdin>", line 15
    command_prefix = f"--logo-color-{i}[{flag["desc"]} ({i})]"
                                               ^^^^
SyntaxError: f-string: unmatched '['

This fix replaces double quotes with single quotes in the f-strings in lines 29, 37 and 41.

[CarterLi]

It's strange. Because the double quotes is inside of the braces, it should not be a problem.

[CarterLi]

Tested myself

Python 3.13.0 (main, Oct  7 2024, 05:02:14) [Clang 16.0.0 (clang-1600.0.26.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> f = { "a": 2 }
>>> f"1{f["a"]}3"
'123'

[Kemboiray]

My system uses Python 3.11. It seems that syntax is invalid in earlier versions of Python.

Python 3.11.0 (heads/3.11-dirty:2c3d839aab1, Mar  4 2024, 11:26:28) [Clang 15.0.0 (clang-1500.1.0.2.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> f = { "a": 2 }
>>> f"1{f["a"]}3"
  File "<stdin>", line 1
    f"1{f["a"]}3"
           ^
SyntaxError: f-string: unmatched '['