mesonconf: fix bad-continuation

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>

mesonconf.py

@@ -23,7 +23,7 @@ from meson import build_types
 parser = argparse.ArgumentParser()
 
 parser.add_argument('-D', action='append', default=[], dest='sets',
-                  help='Set an option to the given value.')
+                    help='Set an option to the given value.')
 parser.add_argument('directory', nargs='*')
 
 class ConfException(Exception):