change extract to combine

Makefile

@@ -9,4 +9,4 @@ pull_translations: clean_translations_temp_directory
 	python i18n_scripts/translation.py --split
 
 extract_translations: clean_translations_temp_directory
-	python i18n_scripts/translation.py --extract
+	python i18n_scripts/translation.py --combine

i18n_scripts/translation.py

@@ -17,14 +17,14 @@
 def parse_arguments():
     """
     This function is the argument parser for this script.
-    The script takes only one of the two arguments --split or --extract as indicated below.
+    The script takes only one of the two arguments --split or --combine as indicated below.
     """
-    parser = argparse.ArgumentParser(description='Split or extract translations.')
+    parser = argparse.ArgumentParser(description='Split or Combine translations.')
     group = parser.add_mutually_exclusive_group(required=True)
     group.add_argument('--split', action='store_true',
                        help='Split translations into separate files for each module and language.')
-    group.add_argument('--extract', action='store_true',
-                       help='Extract the English translations from all modules into a single file.')
+    group.add_argument('--combine', action='store_true',
+                       help='Combine the English translations from all modules into a single file.')
     return parser.parse_args()
 
 
@@ -356,7 +356,7 @@ def main():
     args = parse_arguments()
     if args.split:
         split_translation_files()
-    elif args.extract:
+    elif args.combine:
         combine_translation_files()