def find_line_markers(source):
markers = {}<EOL>for lineno, line in enumerate(source.splitlines(), start=<NUM_LIT:1>):<EOL><INDENT>m = re.search(r"<STR_LIT>", line)<EOL>if m:<EOL><INDENT>markers[lineno] = m.group(<NUM_LIT:1>)<EOL><DEDENT><DEDENT>return markers<EOL>
Find line markers in program source.

    Returns a dict mapping line numbers to the marker on that line.