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-admin/includes/class-theme-installer-skin.php

@@ -67,7 +67,8 @@ class Theme_Installer_Skin extends WP_Upgrader_Skin {
 				'action'     => 'activate',
 				'template'   => urlencode( $template ),
 				'stylesheet' => urlencode( $stylesheet ),
-			), admin_url( 'themes.php' )
+			),
+			admin_url( 'themes.php' )
 		);
 		$activate_link = wp_nonce_url( $activate_link, 'switch-theme_' . $stylesheet );