favor return over return _ (void return); newline/closing terminates

testbed/lexer/std/arraylist/arraylist.bro

@@ -25,7 +25,7 @@ deinit func($T type, list @mut ArrayList(T)) void {
 
 reserve func($T type, list @mut ArrayList(T), minimum_capacity usize) void ! mem.AllocError {
 	if minimum_capacity <= list.capacity {
-		return _
+		return
 	}
 
 	new_capacity usize = 8
@@ -48,7 +48,7 @@ reserve func($T type, list @mut ArrayList(T), minimum_capacity usize) void ! mem
 	}
 	list.items = grown.ptr[..length]
 	list.capacity = new_capacity
-	return _
+	return
 }
 
 append func($T type, list @mut ArrayList(T), value T) void ! mem.AllocError {
@@ -59,7 +59,7 @@ append func($T type, list @mut ArrayList(T), value T) void ! mem.AllocError {
 	try reserve(list, length + 1)
 	list.items = list.items.ptr[..length + 1]
 	list.items[length] = value
-	return _
+	return
 }
 
 clear func($T type, list @mut ArrayList(T)) void {