import subprocess
for fn in subprocess.run(["hg","files",".","-0"], stdout=subprocess.PIPE).stdout.decode("ascii").split("\0"):
        if "test" in fn: continue
        if fn.endswith(".rst"): continue # Permit all the reStructuredText files
        if b"text" not in subprocess.run(["file",fn],stdout=subprocess.PIPE).stdout: continue
        with open(fn,"rb") as f:
            for l,line in enumerate(f,1):
                ln = line
                # There are some terms that keep coming up. It's not interesting to
                # see them over and over; we know they're acceptable non-ASCII text.
                for term in (
                        # Names of various Pythonistas
                        "Martin v. Löwis","Lars Gustäbel","Peter Åstrand","Marc-André Lemburg",
                        "Gerhard Häring","Martin von Löwis","Łukasz Langa","Björn König",
                        # Symbols
                        "©","∞","π",
                        "\ufeff<?xml", # UTF-8 BOMs come up a lot in Windowsy XML files.
                ):
                    ln = ln.replace(term.encode("utf-8"), b"")
                try:
                    ln.decode("ascii")
                    continue # It's all ASCII after the above changes.
                except UnicodeDecodeError:
                    # It's not ASCII. Display the line (the original line, not the trimmed one).
                    line = line.rstrip(b"\n")
                    try: line = line.decode("UTF-8")
                    except UnicodeDecodeError: line = repr(line) # If it's not UTF-8 either, show it as b'...'
                    print("%s:%d: %s" % (fn,l,line))