Fix not receiver

`not foo` should be `!foo`
`not()` should be `!nil`

Fixes [Bug #21027]

Author: kddnewton

lib/prism/translation/ripper.rb

@@ -1045,10 +1045,20 @@ def visit_call_node(node)
             bounds(node.location)
             on_unary(node.name, receiver)
           when :!
-            receiver = visit(node.receiver)
+            if node.message == "not"
+              receiver =
+                if !node.receiver.is_a?(ParenthesesNode) || !node.receiver.body.nil?
+                  visit(node.receiver)
+                end
 
-            bounds(node.location)
-            on_unary(node.message == "not" ? :not : :!, receiver)
+              bounds(node.location)
+              on_unary(:not, receiver)
+            else
+              receiver = visit(node.receiver)
+
+              bounds(node.location)
+              on_unary(:!, receiver)
+            end
           when *BINARY_OPERATORS
             receiver = visit(node.receiver)
             value = visit(node.arguments.arguments.first)

src/prism.c

@@ -19712,11 +19712,12 @@ parse_expression_prefix(pm_parser_t *parser, pm_binding_power_t binding_power, b
             accept1(parser, PM_TOKEN_NEWLINE);
 
             if (accept1(parser, PM_TOKEN_PARENTHESIS_LEFT)) {
-                arguments.opening_loc = PM_LOCATION_TOKEN_VALUE(&parser->previous);
+                pm_token_t lparen = parser->previous;
 
                 if (accept1(parser, PM_TOKEN_PARENTHESIS_RIGHT)) {
-                    arguments.closing_loc = PM_LOCATION_TOKEN_VALUE(&parser->previous);
+                    receiver = (pm_node_t *) pm_parentheses_node_create(parser, &lparen, NULL, &parser->previous);
                 } else {
+                    arguments.opening_loc = PM_LOCATION_TOKEN_VALUE(&lparen);
                     receiver = parse_expression(parser, PM_BINDING_POWER_COMPOSITION, true, false, PM_ERR_NOT_EXPRESSION, (uint16_t) (depth + 1));
 
                     if (!parser->recovering) {