Replace "the the " with "the "

lib/utils/mu-command-handler.hh

@@ -157,7 +157,7 @@ struct Command: public Sexp {
 	 *
 	 * @param name name of the argument
 	 *
-	 * @return false if the the argument is absent or the symbol false;
+	 * @return false if the argument is absent or the symbol false;
 	 * otherwise true.
 	 */
 	bool boolean_arg(const std::string& name) const {

lib/utils/mu-regex.hh

@@ -80,7 +80,7 @@ struct Regex {
 	~Regex() noexcept { g_clear_pointer(&rx_, g_regex_unref); }
 
 	/**
-	 * Cast to the the underlying GRegex*
+	 * Cast to the underlying GRegex*
 	 *
 	 * @return a GRegex*
 	 */