Merge pull request #1827 from NielsdeBlaauw/1722-WordPress.WP.CapitalPDangit

Adds documentation for the WordPress.WP.CapitalPDangit sniff.

Author: dingo-d

WordPress/Docs/WP/CapitalPDangitStandard.xml

@@ -0,0 +1,39 @@
+<documentation title="Capital P Dangit">
+    <standard>
+    <![CDATA[
+The correct spelling of "WordPress" should be used in text strings, comments and object names.
+
+In select cases, when part of an identifier or a URL, WordPress does not have to be capitalized.
+    ]]>
+    </standard>
+    <code_comparison>
+        <code title="Valid: WordPress is correctly capitalized.">
+        <![CDATA[
+class <em>WordPress</em>_Example {
+
+    /**
+     * This function is about <em>WordPress</em>.
+     */
+    public function explain() {
+        echo 'This is an explanation
+            about <em>WordPress</em>.';
+    }
+}
+        ]]>
+        </code>
+        <code title="Invalid: WordPress is not correctly capitalized.">
+        <![CDATA[
+class <em>Wordpress_Example</em> {
+
+    /**
+     * This function is about <em>Wordpress</em>.
+     */
+    public function explain() {
+        echo 'This is an explanation
+            about <em>wordpress</em>.';
+    }
+}
+        ]]>
+        </code>
+    </code_comparison>
+</documentation>