chore: fix some instances of bad wording

Co-authored-by: inclusive-coding-bot <inclusive-coding-bot@github.com>

plugins/sprunge/README.md

@@ -18,7 +18,8 @@ plugins=(... sprunge)
 | `echo data \| sprunge`       | Any piped data will be uploaded           |
 
 Once sprunge has processed the input it will give you a unique HTTP address:
-```
+
+```console
 $ sprunge "hello"
 http://sprunge.us/XxjnKz
 ```
@@ -30,3 +31,8 @@ http://sprunge.us/XxjnKz
 - Argument precedence goes as follows: stdin > piped input > text strings.
 - If a filename is misspelled or doesn't have the necessary path description, it will NOT
   generate an error, but instead treat it as a text string.
+
+## Credits
+
+- Original code: [shellperson.net](https://web.archive.org/web/20190601000000*/https://www.shellperson.net/sprunge-pastebin-script/).
+- Adapted by: Matt Parnell (@ilikenwf).

plugins/sprunge/sprunge.plugin.zsh

@@ -1,7 +1,3 @@
-# Contributed and SLIGHTLY modded by Matt Parnell/ilikenwf <parwok -at- gmail>
-# Created by the blogger at the URL below...I don't know where to find his/her name
-# Original found at https://www.shellperson.net/sprunge-pastebin-script/
-
 sprunge() {
   if [[ "$1" = --help ]]; then
     fmt -s >&2 << EOF