Improve parse_args

Signed-off-by: rffontenelle <rffontenelle@gmail.com>

powrap/powrap.py

@@ -94,14 +94,15 @@ def parse_args():
     parser = argparse.ArgumentParser(
         prog="powrap",
         description="Ensure po files are using the standard gettext format",
+        formatter_class=argparse.RawTextHelpFormatter,
         epilog="""exit code:
     0:nothing to do
     1:would rewrap
   127:error running msgcat""",
     )
     parser.add_argument(
-        "--modified",
         "-m",
+        "--modified",
         action="store_true",
         help="Use git to find modified files instead of passing them as arguments.",
     )
@@ -114,11 +115,11 @@ def parse_args():
         default=Path.cwd(),
     )
     parser.add_argument(
-        "--quiet", "-q", action="store_true", help="Do not show progress bar."
+        "-q", "--quiet", action="store_true", help="Do not show progress bar."
     )
     parser.add_argument(
-        "--diff",
         "-d",
+        "--diff",
         action="store_true",
         help="Don't write the files back, just output a diff for each file on stdout "
         "(implies --check).",