have keep_quoted respect quoted method names (#2258)

fixes #2257

lib/compress.js

@@ -4824,7 +4824,8 @@ merge(Compressor.prototype, {
             arrow.is_generator = self.is_generator;
             return make_node(AST_ObjectKeyVal, self, {
                 key: self.key instanceof AST_SymbolMethod ? self.key.name : self.key,
-                value: arrow
+                value: arrow,
+                quote: self.quote,
             });
         }
         return self;
@@ -4850,6 +4851,7 @@ merge(Compressor.prototype, {
                         name: key,
                     }),
                     value: make_node(AST_Accessor, value, value),
+                    quote: self.quote,
                 });
             }
         }

lib/propmangle.js

@@ -129,6 +129,9 @@ function mangle_properties(ast, options) {
         if (node instanceof AST_ObjectKeyVal) {
             add(node.key, keep_quoted && node.quote);
         }
+        else if (node instanceof AST_ConciseMethod && node.key && node.key.name) {
+            add(node.key.name, keep_quoted && node.quote);
+        }
         else if (node instanceof AST_ObjectProperty) {
             // setter or getter, since KeyVal is handled above
             add(node.key.name);
@@ -139,9 +142,6 @@ function mangle_properties(ast, options) {
         else if (node instanceof AST_Sub) {
             addStrings(node.property, keep_quoted);
         }
-        else if (node instanceof AST_ConciseMethod) {
-            add(node.name.name);
-        }
     }));
 
     // step 2: transform the tree, renaming properties
@@ -150,6 +150,11 @@ function mangle_properties(ast, options) {
             if (!(keep_quoted && node.quote))
                 node.key = mangle(node.key);
         }
+        else if (node instanceof AST_ConciseMethod && node.name && node.key.name) {
+            if (!(keep_quoted && node.quote) && should_mangle(node.key.name)) {
+                node.key.name = mangle(node.key.name);
+            }
+        }
         else if (node instanceof AST_ObjectProperty) {
             // setter or getter
             node.key.name = mangle(node.key.name);
@@ -161,11 +166,6 @@ function mangle_properties(ast, options) {
             if (!keep_quoted)
                 node.property = mangleStrings(node.property);
         }
-        else if (node instanceof AST_ConciseMethod) {
-            if (should_mangle(node.name.name)) {
-                node.name.name = mangle(node.name.name);
-            }
-        }
         // else if (node instanceof AST_String) {
         //     if (should_mangle(node.value)) {
         //         AST_Node.warn(