Merge pull request #177 from wp-blocks/0.7.4b

Refine value check: trim strings before validating emptiness

Author: erikyo

core/CF7_AntiSpam_Filters.php

@@ -1356,7 +1356,7 @@ private function create_message_from_posted_data( ?array $posted_data ): string
 			}
 
 			// Skip empty values or non-string values
-			if ( empty( $value ) || ! is_string( $value ) ) {
+			if ( ! is_string( $value ) || empty( trim( $value ) ) ) {
 				continue;
 			}