This change does seem to not affect appearance at all in X11 or Windows, and likewise I do not observe any differences when applied to Perl/Tk, but I am providing this for consistency, as well as to verify if this change is appropriate or if it introduces any issues that I'm not yet aware of.
This is the change that I made in Tcl::pTk 1.00 to resolve a few issues on macOS Aqua: RT #125049, RT #129505.
This change does seem to not affect appearance at all in X11 or Windows, and likewise I do not observe any differences when applied to Perl/Tk, but I am providing this for consistency, as well as to verify if this change is appropriate or if it introduces any issues that I'm not yet aware of.