ConfigParser will write, but not read keys with spaces in, eg
key with spaces in = 5
 raises a parse exception.

My fix, tested a small amount on one file!:  
Change regexp on Line 390 to
    OPTCRE = re.compile(
        r'(?P<option>[^=:]+?)'      # anything not an = or :, don;t grab the last space, leave for next bit
        r'[ \t]*(?P<vi>[:=])[ \t]*'           # any number of space/tab,
                                              # followed by separator
                                              # (either : or =), followed
                                              # by any # space/tab
        r'(?P<value>.*)$'                     # everything up to eol
        )