Coding Standards: Use strict comparison in `wp-admin/plugin-install.p…

…hp`.

Follow-up to [11366].

See #54728.

git-svn-id: https://develop.svn.wordpress.org/trunk@52534 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/plugin-install.php

@@ -52,7 +52,7 @@
 $parent_file = 'plugins.php';
 
 wp_enqueue_script( 'plugin-install' );
-if ( 'plugin-information' != $tab ) {
+if ( 'plugin-information' !== $tab ) {
 	add_thickbox();
 }