[#336] Fix broken link (#340)

Close #336

Author: raxod502

Makefile

@@ -49,6 +49,8 @@ checkdoc: ## Check for missing or poorly formatted docstrings
 	        --eval "(or (fboundp 'checkdoc-file) (kill-emacs))" \
 	        --eval "(setq sentence-end-double-space nil)" \
 	        --eval "(checkdoc-file \"$$file\")" 2>&1 \
+		| (grep -v "Warning (emacs): \\?$$" ||:) \
+		| (grep -v "Some lines are over 80 columns wide" ||:) \
 	        | grep . && exit 1 || true ;\
 	done
 

README.md

@@ -28,7 +28,7 @@ The approach is as follows:
    has finished running, check if the buffer has been modified since
    it started; only apply the changes if not.
 2. After running the code formatter, generate an [RCS
-   patch](https://tools.ietf.org/doc/tcllib/html/rcs.html#section4)
+   patch](https://web.archive.org/web/20220527003730/https://tools.ietf.org/doc/tcllib/html/rcs.html#section4)
    showing the changes and then apply it to the buffer. This prevents
    changes elsewhere in the buffer from moving point. If a patch
    region happens to include point, then use a [dynamic programming

apheleia-rcs.el

@@ -25,7 +25,7 @@ the following keys:
 - `lines': number of lines to be inserted or removed
 - `text': the string to be inserted, only for `addition'
 
-See <https://tools.ietf.org/doc/tcllib/html/rcs.html#section4>
+See <https://web.archive.org/web/20220527003730/https://tools.ietf.org/doc/tcllib/html/rcs.html#section4>
 for documentation on the RCS patch format."
   (save-excursion
     (goto-char (point-min))
@@ -206,3 +206,7 @@ contains the patch."
 (provide 'apheleia-rcs)
 
 ;;; apheleia-rcs.el ends here
+
+;; Local Variables:
+;; byte-compile-docstring-max-column: 160
+;; End: