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.


Built from https://develop.svn.wordpress.org/trunk@43571


git-svn-id: http://core.svn.wordpress.org/trunk@43400 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-walker-category.php

@@ -168,7 +168,8 @@ class Walker_Category extends Walker {
 			if ( ! empty( $args['current_category'] ) ) {
 				// 'current_category' can be an array, so we use `get_terms()`.
 				$_current_terms = get_terms(
-					$category->taxonomy, array(
+					$category->taxonomy,
+					array(
 						'include'    => $args['current_category'],
 						'hide_empty' => false,
 					)