Coding Standards: Fix WPCS issues in wp-admin/plugin-editor.php and…

… `wp-admin/theme-editor.php`.

See #49542.

git-svn-id: https://develop.svn.wordpress.org/trunk@47845 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/plugin-editor.php

@@ -221,7 +221,7 @@
 		<?php
 		foreach ( $plugins as $plugin_key => $a_plugin ) {
 			$plugin_name = $a_plugin['Name'];
-			if ( $plugin_key == $plugin ) {
+			if ( $plugin_key === $plugin ) {
 				$selected = " selected='selected'";
 			} else {
 				$selected = '';

src/wp-admin/theme-editor.php

@@ -177,7 +177,7 @@
 $file_description = get_file_description( $relative_file );
 $file_show        = array_search( $file, array_filter( $allowed_files ), true );
 $description      = esc_html( $file_description );
-if ( $file_description != $file_show ) {
+if ( $file_description !== $file_show ) {
 	$description .= ' <span>(' . esc_html( $file_show ) . ')</span>';
 }
 ?>
@@ -230,7 +230,7 @@
 				continue;
 			}
 
-			$selected = $a_stylesheet == $stylesheet ? ' selected="selected"' : '';
+			$selected = ( $a_stylesheet === $stylesheet ) ? ' selected="selected"' : '';
 			echo "\n\t" . '<option value="' . esc_attr( $a_stylesheet ) . '"' . $selected . '>' . $a_theme->display( 'Name' ) . '</option>';
 		}
 		?>
@@ -298,7 +298,7 @@
 
 		<div>
 			<div class="editor-notices">
-				<?php if ( is_child_theme() && $theme->get_stylesheet() == get_template() ) : ?>
+				<?php if ( is_child_theme() && $theme->get_stylesheet() === get_template() ) : ?>
 					<div class="notice notice-warning inline">
 						<p>
 							<?php if ( is_writeable( $file ) ) : ?>