more reliable t.isExpression

test/fixtures/generation/comments/computed-property-comments-2/expected.js

@@ -3,8 +3,8 @@ var test = {
    * Before bracket init
    */
   ["a"]: "1",
-  [/*
-    * Inside bracket init
-    */
-  "b"]: "2"
+  [( /*
+      * Inside bracket init
+      */
+  "b")]: "2"
 }, ok = 42;

test/fixtures/generation/comments/computed-property-comments/expected.js

@@ -4,10 +4,10 @@ var test = {
    */
   ["a"]: "1",
 
-  [/*
-    * Inside bracket init
-    */
-  "b"]: "2",
+  [( /*
+      * Inside bracket init
+      */
+  "b")]: "2",
 
   ["c"
   /*
@@ -17,9 +17,9 @@ var test = {
   // Before bracket, line comment
   ["d"]: "4",
 
-  [
+  [(
   // Inside bracket, line comment
-  "e"]: "5",
+  "e")]: "5",
 
   ["f"
   // After bracket, line comment