textwrap module not usable with MicroPython ure

I have a port of MicroPython which includes the ure module. I tried to bring in the textwrap module from this project, but ran into a couple of issues:

    wordsep_re = re.compile(
        r'(\s+|'                                  # any whitespace
        r'[^\s\w]*\w+[^0-9\W]-(?=\w+[^0-9\W])|'   # hyphenated words
        r'(?<=[\w\!\"\'\&\.\,\?])-{2,}(?=\w))')   # em-dash

This regular expression does not compile cleanly as ure does not support the (?= notation

_whitespace_only_re = re.compile('^[ \t]+$', re.MULTILINE)
_leading_whitespace_re = re.compile('(^[ \t]*)(?:[^ \t\n])', re.MULTILINE)

These two also fail to compile, in this case because the MULTILINE flag is missing

Start by locating the textwrap module and the definitions of wordsep_re, _whitespace_only_re, and _leading_whitespace_re. Check MicroPython ure's supported syntax and flags, then verify that text wrapping works with ure without compilation errors; the issue is resolved when these expressions are compatible with the reported port.