[issue36390] IDLE: Refactor formatting methods from editor

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

I think get_indent(line) is much clearer than classifyws(s)???.  I propose to merge PR 12481 first, after review, with tests, and then include name change with rewrite in PR 14500.  Proposed docstring:
"Return line indent as # chars and effective # of spaces."

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<https://bugs.python.org/issue36390>
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