Edit some comments; Update phpstan

Backend/Core/Data/Query.php

@@ -55,7 +55,7 @@ public function setQueryString(string $queryStr): void {
 	}
 
 	/**
-	 * Returns the current query string
+	 * Query string getter
 	 *
 	 * @return string Current query
 	 */
@@ -130,7 +130,7 @@ private function execute(): void {
 	}
 
 	/**
-	 * Counts the effected rows by the last query and returns them
+	 * Counts the effected rows of the last query
 	 *
 	 * @return integer Effected rows
 	 */
@@ -141,9 +141,7 @@ public function count(): int {
 	}
 
 	/**
-	 * Returns whether the query was successful
-	 *
-	 * @return boolean Query successful
+	 * @return boolean whether the query was successful
 	 */
 	public function success(): bool {
 		if (!$this->run)

Backend/Core/System/IO.php

@@ -141,9 +141,7 @@ public static function domain(): string {
 	}
 
 	/**
-	 * Returns the currently Requested URL
-	 *
-	 * @return string The requested path
+	 * @return string Currently requested path
 	 * @throws Exception When no request is set
 	 */
 	public static function path(): string {
@@ -153,15 +151,13 @@ public static function path(): string {
 	}
 
 	/**
-	 * Returns the full URL with protocol and request uri
-	 * @return string The full URL with protocol
+	 * @return string Full URL with protocol and request uri
 	 */
 	public static function fullURL(): string {
 		return 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
 	}
 
 	/**
-	 * Returns the request method
 	 * @return string HTTP request method
 	 */
 	public static function method(): string {
@@ -171,7 +167,6 @@ public static function method(): string {
 	}
 
 	/**
-	* Returns the HTTP 'Accept' header
 	* @return string HTTP 'Accept' header
 	*/
 	public static function accept(): string {