“To err is human. To arr is pirate”

“To err is human; to forgive, divine” was written by Alexander Pope (1688-1744) in “An Essay on Criticism” (1711). The line is famous and has many parodies.
 
A pirate joke that has been printed on many images is:
   
“To err is human. To arr is pirate.”
       
The pirate joke was posted on the newsgroup rec.games.roguelike.nethack on June 12, 2004.
 
       
Google Groups: rec.games.roguelike.nethack
YAFAP Orange-Val-Dwa-Law (spoilt rotten)
Nathan Maloney
6/12/04
(...)
To err is human, to arr is pirate.
 
Twitter
Kevin Cupp‏
@kevincupp
Wearing my “To Err is Human, To Arr is Pirate” shirt.
12:56 PM - 24 Apr 2007
 
Google Books
May 2007, GameAxis Unwired, pg. 43;
To Err Is Human, To Yarr is Pirate
   
Google Groups: rec.music.makers.guitar.acoustic
OT..brief joke of the year
Nigel Tucker
7/26/07
Best T-Shirt slogan:
“To err is human
To Aargh is Pirate”
 
Well, I liked it
 
20 June 2008, Townsville (Queensland) Bulletin, “Transport not public at all” by Mary Vernon, pg. 19:
To err is human
to arr is pirate
       
Bradenton (FL) Patch
Braden River High Honors Class of 2011
Graduates are celebrated at Friday’s ceremony at the Manatee Convention Center.
0By Jessi Smith (Patch Poster) - Updated June 4, 2011 2:33 am ET
(...)
Quotable: “To err is human, but to ‘arrrr’ is pirate. As 2011 graduates, we may make a few mistakes along the way — but we will always be Pirates.” — Desiray Sutherland, in her commencement speech.
 
Google Books
5,000 Great One Liners
Compiled by Grant TUcker
London, UK: Biteback Publishing
2012
Pg. ?:
To err is human, to arr is pirate.
 
Twitter
US Design T-Shirts‏
@USDesignTShirts
eBay: Men’s Red Small To Err Is Human To Arr Is Pirate T-Shirt Cheap Tee Rude http://rssdata.net/PpHzKZ  #tshirts #fashion
11:16 AM - 20 Sep 2017