“What do you call a witch’s garage?”/“A broom closet.”

A witch riddle is:
 
Q: What do you call a witch’s garage?
A: A broom closet.
 
The popular Halloween riddle was posted on the newsgroup soc.culture.filipino on October 22, 1996.
     
 
Google Groups: soc.culture.filipino
HAPPY HALLOWEEN
Gorgeous
10/22/96
(...)
Q. What do you call a witch’s garage?
A. A broom closet.
   
Google Books
The Fright Zone:
Jokes, Riddles, Tongue Twisters & “Daffynitions”
By Gary Chmielewski
Illustrated by Jim Caputo
Chicago, IL: Norwood House Press
2009
Pg. 9:
What do you call a witch’s garage?
A broom closet!
 
Twitter
FunnyOneLiners‏
@Funnyoneliners
What do you call the witch’s garage? 
The broom closet.
2:53 PM - 22 Oct 2009
 
Google Books
Kooky Halloween Jokes to Tickle Your Funny Bone
By Linda Bozzo
Berkeley Heights, NJ: Enslow Publishers, Inc.
2013
Pg. 42:
What do you call a witch’s garage?
Her broom closet.
 
Google Books
Monster Jokes
By Ima Laffin
Minneapolis, MN: Abdo Publishing
2017
Pg. 30:
What do you call a witch’s garage?
A broom closet.
 
Twitter
Navug Minnesota‏
@NavugMinnesota
Q: What do you call a witch’s garage? A: A broom closet.  Happy Halloween NAVUGers! #NAVUG #michellesjokesarethebest
9:57 AM - 27 Oct 2017