On every edit of a file without tabs: You MUST use spaces! error

[eugenesvk]

I get this error on every single edit in a syntax file even if the file is almost emtpy (so guaranteed to have no tabs, and the syntax settings are also translate_tabs_to_spaces), which is very annoying

Tested with the TOML package, extracted syntax_test_toml.toml and replaced the content with an empty doc

# SYNTAX TEST "Packages/sublime_toml_highlighting/TOML.sublime-syntax"

# This is a TOML document. Boom.

Even if I switch to tabs and let the plugin switch back to spaces, I get this error

Since the source is https://github.com/SublimeText/PackageDev/blob/8d4ffb33e7e0b7bbf5dd5e8b3b9721615093c3dc/plugins/syntaxtest_dev.py#LL81C1-L87C62, maybe there is some issue with the plugin element gets __del__ too frequently invoked (or something)???

    def __del__(self):
        # Settings were (most likely) changed to use tabs
        # or plugin was unloaded.
        # Complain about the former, if we have a test file.
        if self.header and not self.is_applicable(self.view.settings()):
            sublime.error_message("Syntax tests do not work properly with tabs as indentation."
                                  "\n\nYou MUST use spaces!")

And this issue is not related to #177, where files had actual tabs, but just wanted to comment on the general approach

I know it's not really your syntax test file, but if it annoys enough people, someone might actually submit a PR to fix that

This is just bad design to annoy many people on the off chance a tiny number would fix the issue, that's just not that important a goal to impose such costs, and this can also get annoyances like this one that might not be related to tabs