Remove extraneous parens around return arguments.

This resolves #540.

test/src/btalloc.c

@@ -2,5 +2,5 @@
 
 void *
 btalloc(size_t size, unsigned bits) {
-	return (btalloc_0(size, bits));
+	return btalloc_0(size, bits);
 }

test/src/mtx.c

@@ -9,7 +9,7 @@ mtx_init(mtx_t *mtx) {
 #ifdef _WIN32
 	if (!InitializeCriticalSectionAndSpinCount(&mtx->lock,
 	    _CRT_SPINCOUNT)) {
-		return (true);
+		return true;
 	}
 #elif (defined(JEMALLOC_OS_UNFAIR_LOCK))
 	mtx->lock = OS_UNFAIR_LOCK_INIT;
@@ -19,16 +19,16 @@ mtx_init(mtx_t *mtx) {
 	pthread_mutexattr_t attr;
 
 	if (pthread_mutexattr_init(&attr) != 0) {
-		return (true);
+		return true;
 	}
 	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_DEFAULT);
 	if (pthread_mutex_init(&mtx->lock, &attr) != 0) {
 		pthread_mutexattr_destroy(&attr);
-		return (true);
+		return true;
 	}
 	pthread_mutexattr_destroy(&attr);
 #endif
-	return (false);
+	return false;
 }
 
 void

test/src/test.c

@@ -65,7 +65,7 @@ p_test_impl(bool do_malloc_init, test_t *t, va_list ap) {
 		 */
 		if (nallocx(1, 0) == 0) {
 			malloc_printf("Initialization error");
-			return (test_status_fail);
+			return test_status_fail;
 		}
 	}
 
@@ -85,7 +85,7 @@ p_test_impl(bool do_malloc_init, test_t *t, va_list ap) {
 	    test_status_string(test_status_fail),
 	    test_counts[test_status_fail], test_count);
 
-	return (ret);
+	return ret;
 }
 
 test_status_t
@@ -98,7 +98,7 @@ p_test(test_t *t, ...) {
 	ret = p_test_impl(true, t, ap);
 	va_end(ap);
 
-	return (ret);
+	return ret;
 }
 
 test_status_t
@@ -111,7 +111,7 @@ p_test_no_malloc_init(test_t *t, ...) {
 	ret = p_test_impl(false, t, ap);
 	va_end(ap);
 
-	return (ret);
+	return ret;
 }
 
 void

test/src/timer.c

@@ -18,7 +18,7 @@ timer_usec(const timedelta_t *timer) {
 
 	nstime_copy(&delta, &timer->t1);
 	nstime_subtract(&delta, &timer->t0);
-	return (nstime_ns(&delta) / 1000);
+	return nstime_ns(&delta) / 1000;
 }
 
 void