Fixes files used as input when pre-processing MPL-containers in their numbered form.

def fix_input_files_for_numbered_seq(sourceDir, suffix, timestamp, containers):
    """Fixes files used as input when pre-processing MPL-containers in their numbered form."""
    # Fix input files for each MPL-container type.
    for container in containers:
        files = glob.glob( os.path.join( sourceDir, container, container + '*' + suffix ) )
        for currentFile in sorted( files ):
            fix_header_comment( currentFile, timestamp )