Update help message to reflect we print out diffs

Author: DanielNoord

README.md

@@ -20,7 +20,7 @@ positional arguments:
 
 options:
   -h, --help     show this help message and exit
-  -w, --write    Write the changes to file instead of printing the files to stdout
+  -w, --write    Write the changes to file instead of printing the diffs to stdout
   -v, --version  Show version number and exit
 ```
 

pydocstringformatter/utils/argument_parsing.py

@@ -26,7 +26,7 @@ def _register_arguments(version: str) -> argparse.ArgumentParser:
         "-w",
         "--write",
         action="store_true",
-        help="Write the changes to file instead of printing the files to stdout",
+        help="Write the changes to file instead of printing the diffs to stdout",
     )
 
     parser.add_argument(