WP/Capabilities: tiny tweaks

* Use `$%s` to indicate a parameter name in an error message.
* Consistently use multi-line array for `$data` parameter with multiple entries (as in: consistent with how this is done elsewhere in this same sniff).
* Mark a remark about a lists which needs regular updates as `@internal`.

WordPress/Sniffs/WP/CapabilitiesSniff.php

@@ -165,14 +165,15 @@ class CapabilitiesSniff extends AbstractFunctionParameterSniff {
 	/**
 	 * List of known primitive and meta core capabilities.
 	 *
-	 * To be updated after every major release. Sorted alphabetically.
-	 * Last updated for WordPress 6.1.0.
-	 *
 	 * Sources:
 	 * - {@link https://wordpress.org/support/article/roles-and-capabilities/ Roles and Capabilities handbook page}
 	 * - The `map_meta_cap()` function in the `src/wp-includes/capabilities.php` file.
 	 * - The tests in the `tests/phpunit/tests/user/capabilities.php` file.
 	 *
+	 * List is sorted alphabetically.
+	 *
+	 * {@internal To be updated after every major release. Last updated for WordPress 6.1.0.}
+	 *
 	 * @since 3.0.0
 	 *
 	 * @var array<string, bool> All capabilities available in core.
@@ -382,7 +383,11 @@ public function process_parameters( $stackPtr, $group_name, $matched_content, $p
 					'Couldn\'t determine the value passed to the $%s parameter in function call to %s(). Please check if it matches a valid capability. Found: %s',
 					$i,
 					'Undetermined',
-					array( $function_details['name'], $matched_content, $parameter['clean'] ),
+					array(
+						$function_details['name'],
+						$matched_content,
+						$parameter['clean'],
+					),
 					3 // Message severity set to below default.
 				);
 				return;
@@ -408,7 +413,7 @@ public function process_parameters( $stackPtr, $group_name, $matched_content, $p
 
 		if ( empty( $matched_parameter ) ) {
 			$this->phpcsFile->addError(
-				'An empty string is not a valid capability. Empty string found as the %s parameter in a function call to %s()"',
+				'An empty string is not a valid capability. Empty string found as the $%s parameter in a function call to %s()"',
 				$first_non_empty,
 				'Invalid',
 				array(