Make source code readable on forums that have poor support

convert_leading_spaces_to_en

#!/usr/bin/env python3
import sys


def fix_line(l):
    if not l:
        return l
    if l[0] == " ":
        # Non breaking: "\u00a0" - but munged by some browsers
        # EM space: "\u2003" - not munged by browsers
        # EN space: "\u2002" - not munged by browsers, approx normal char width
        return "\u2002" + fix_line(l[1:])
    else:
        return l


if __name__ == '__main__':
    for l in sys.stdin.readlines():
        sys.stdout.write(fix_line(l))