Merge \\\"Avoid matching the same warning line twice.\\\" am: 0cbba3df am: 472589e1

compilepatterns()

# read the log file and classify all the warnings

lastmatchedline = ''

warninglines = set()

for line in infile:

    # replace fancy quotes with plain ol' quotes

    line = line.replace("‘", "'");

    line = line.replace("’", "'");

    if warningpattern.match(line):

        if line != lastmatchedline:

        if line not in warninglines:

            classifywarning(line)

            lastmatchedline = line

            warninglines.add(line)

    else:

        # save a little bit of time by only doing this for the first few lines

        if linecounter < 50: