brew-installed: fix comment typos

commands/brew-installed

@@ -30,18 +30,18 @@ function brew_installed() (
 			    Output only packages that are casks.
 
 			--quiet
-			    If provided, do not output anything, just return the exist status.
+			    If provided, do not output anything, just return the exit status.
 
 			...<package>
 			    If provided, only get details for these packages. Fail if one of them has not yet been installed.
 
 			QUIRKS:
-			If packages are provided, failure exist status will be returned if any are missing.
+			If packages are provided, failure exit status will be returned if any are missing.
 			To check if any are present, use:
 
 			    $(echo-style --code="test -n \"\$(brew-installed -- bash something-missing || :)\"")
 
-			If you just want the exist status, use:
+			If you just want the exit status, use:
 
 			    $(echo-style --code="brew-installed --quiet -- bash something-missing")
 		EOF