Numeric literal callees should keep parens (#141)

* Numeric literal callees should keep parens

* Remove isNumber check

src/fast-path.js

@@ -329,6 +329,9 @@ FPp.needsParens = function(assumeExpressionContext) {
         && name === "object"
         && parent.object === node;
 
+    case "NumericLiteral":
+      return parent.type === "MemberExpression";
+
     case "AssignmentExpression":
     case "ConditionalExpression":
       switch (parent.type) {

tests/literal/__snapshots__/jsfmt.spec.js.snap

@@ -84,6 +84,11 @@ function test4(flip_times: number): number {
   }
   return x;
 }
+
+// parentheses around numeric literal should be preserved
+function test5(): string {
+  return (100).toString();
+}
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 function test1(x: number): number {
   return -x;
@@ -108,5 +113,10 @@ function test4(flip_times: number): number {
   }
   return x;
 }
+
+// parentheses around numeric literal should be preserved
+function test5(): string {
+  return (100).toString();
+}
 "
 `;

tests/literal/number.js

@@ -21,3 +21,8 @@ function test4(flip_times: number): number {
   }
   return x;
 }
+
+// parentheses around numeric literal should be preserved
+function test5(): string {
+  return (100).toString();
+}