Coding Standards: Upgrade WPCS to 1.0.0

WPCS 1.0.0 includes a bunch of new auto-fixers, which drops the number of coding standards issues across WordPress significantly. Prior to running the auto-fixers, there were 15,312 issues detected. With this commit, we now drop to 4,769 issues.

This change includes three notable additions:
- Multiline function calls must now put each parameter on a new line.
- Auto-formatting files is now part of the `grunt precommit` script. 
- Auto-fixable coding standards issues will now cause Travis failures.

Fixes #44600.



git-svn-id: https://develop.svn.wordpress.org/trunk@43571 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/widgets/class-wp-widget-custom-html.php

@@ -131,7 +131,8 @@ class WP_Widget_Custom_HTML extends WP_Widget {
 
 		// Prepare instance data that looks like a normal Text widget.
 		$simulated_text_widget_instance = array_merge(
-			$instance, array(
+			$instance,
+			array(
 				'text'   => isset( $instance['content'] ) ? $instance['content'] : '',
 				'filter' => false, // Because wpautop is not applied.
 				'visual' => false, // Because it wasn't created in TinyMCE.