turns out f-strings before 3.8 don't support {variable=} notation, ta…

turns out f-strings before 3.8 don't support {variable=} notation, ta… · gitpython-developers/GitPython@cffa264

Original file line number	Diff line number	Diff line change
`@@ -490,7 +490,7 @@ def is_cygwin_git(git_executable: PathLike) -> bool: ...`
`490`	`490`
`491`	`491`
`492`	`492`	`def is_cygwin_git(git_executable: Union[None, PathLike]) -> bool:`
`493`		`-_logger.debug(f"{sys.platform=}, {git_executable=}")`
	`493`	`+_logger.debug(f"sys.platform = {sys.platform}, git_executable = {git_executable}")`
`494`	`494`	`if sys.platform != "cygwin":`
`495`	`495`	`return False`
`496`	`496`	`elif git_executable is None:`