def _detab(self, text):
if '<STR_LIT:\t>' not in text:<EOL><INDENT>return text<EOL><DEDENT>return self._detab_re.subn(self._detab_sub, text)[<NUM_LIT:0>]<EOL>
r"""Remove (leading?) tabs from a file.

            >>> m = Markdown()
            >>> m._detab("\tfoo")
            '    foo'
            >>> m._detab("  \tfoo")
            '    foo'
            >>> m._detab("\t  foo")
            '      foo'
            >>> m._detab("  foo")
            '  foo'
            >>> m._detab("  foo\n\tbar\tblam")
            '  foo\n    bar blam'