I18N: Capitalize translator comments consistently, add trailing punctuation.

Includes minor code layout fixes.

See #44360.

git-svn-id: https://develop.svn.wordpress.org/trunk@45932 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/setup-config.php

@@ -187,7 +187,7 @@ switch ( $step ) {
 	</strong>
 		<?php
 		printf(
-			/* translators: %s: Documentation URL */
+			/* translators: %s: Documentation URL. */
 			__( 'Need more help? <a href="%s">We got it</a>.' ),
 			__( 'https://wordpress.org/support/article/editing-wp-config-php/' )
 		);