`export foor=bar` is valid in POSIX

https://sourceforge.net/p/checkbaskisms/checkbashisms/9/
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#export
https://bugs.gentoo.org/458392

--- a/checkbashisms
+++ b/checkbashisms
@@ -512,7 +512,6 @@
 	$LEADIN . qr'disown\s' =>         q<disown>,
 	$LEADIN . qr'enable\s' =>         q<enable>,
         $LEADIN . qr'export\s+-[^p]' =>  q<export only takes -p as an option>,
-        $LEADIN . qr'export\s+.+=' => q<export foo=bar should be foo=bar; export foo>,
 	$LEADIN . qr'mapfile\s' =>        q<mapfile>,
 	$LEADIN . qr'readarray\s' =>      q<readarray>,
 	$LEADIN . qr'readonly\s+-[af]' => q<readonly -[af]>,