Docs: miscellaneous changes

Change `WPCS` to `WordPressCS` in miscellaneous files.

.gitattributes

@@ -1,7 +1,7 @@
 #
 # Exclude these files from release archives.
 # This will also make them unavailable when using Composer with `--prefer-dist`.
-# If you develop for WPCS using Composer, use `--prefer-source`.
+# If you develop for WordPressCS using Composer, use `--prefer-source`.
 # https://blog.madewithlove.be/post/gitattributes/
 #
 /.gitattributes     export-ignore

.phpcs.xml.dist

@@ -51,7 +51,7 @@
 		<!-- Linting is done in a separate CI job, no need to duplicate it. -->
 		<exclude name="Generic.PHP.Syntax"/>
 
-		<!-- WPCS still has a PHP 5.4 minimum. -->
+		<!-- WordPressCS still has a PHP 5.4 minimum. -->
 		<exclude name="Modernize.FunctionCalls.Dirname"/>
 	</rule>
 

Tests/RulesetCheck/class-ruleset-test.inc

@@ -1,14 +1,14 @@
 <?php
 /**
- * Simple file which should not have any issues when testing against the WPCS rulesets.
+ * Simple file which should not have any issues when testing against the WordPressCS rulesets.
  *
  * Most - if not all - sniffs should be triggered by this file.
  *
  * Used to do a simple CI test on the rulesets.
  *
  * Currently covered - based on the rulesets as of July 24 2018:
- * - Every WPCS native sniff is triggered.
- * - Every WPCS + PHPCS sniff within the Core ruleset is triggered.
+ * - Every WordPressCS native sniff is triggered.
+ * - Every WordPressCS + PHPCS sniff within the Core ruleset is triggered.
  *
  * @package WPCS\WordPressCodingStandards
  */