no trailing comma for single-line flow object types

Author: Keyan Zhang

transforms/__testfixtures__/class-flow1.output.js

@@ -16,10 +16,10 @@ class Component extends React.Component {
     optionalEnum?: ?('News' | 'Photos' | 1 | true | null),
     optionalUnion?: ?(string | number | Message),
     optionalArrayOf?: ?Array<number>,
-    optionalObjectOf?: ?{[key: string]: ?number,},
-    optionalObjectOfNonOptionalField?: ?{[key: string]: number,},
-    objectOfNonOptionalField: {[key: string]: number,},
-    objectOfOptionalField: {[key: string]: ?number,},
+    optionalObjectOf?: ?{[key: string]: ?number},
+    optionalObjectOfNonOptionalField?: ?{[key: string]: number},
+    objectOfNonOptionalField: {[key: string]: number},
+    objectOfOptionalField: {[key: string]: ?number},
     optionalObjectWithShape?: ?{
       color?: ?string,
       fontSize: number,

transforms/__testfixtures__/class-flow3.input.js

@@ -34,7 +34,6 @@ var Component = React.createClass({
     optionalObjectOf: PropTypes.objectOf(PropTypes.number),
     optionalObjectWithShape: PropTypes.shape({
       color: PropTypes.string,
-      fontSize: PropTypes.number,
     }),
     requiredFunc: PropTypes.func.isRequired,
     requiredAny: PropTypes.any.isRequired,

transforms/__testfixtures__/class-flow3.output.js

@@ -30,11 +30,8 @@ class Component extends React.Component {
     optionalEnum?: ?('News' | 'Photos' | 1 | true | null),
     optionalUnion?: any,
     optionalArrayOf?: ?Array<number>,
-    optionalObjectOf?: ?{[key: string]: ?number,},
-    optionalObjectWithShape?: ?{
-      color?: ?string,
-      fontSize?: ?number,
-    },
+    optionalObjectOf?: ?{[key: string]: ?number},
+    optionalObjectWithShape?: ?{color?: ?string},
     requiredFunc: Function,
     requiredAny: any,
   };
@@ -54,7 +51,6 @@ class Component extends React.Component {
     optionalObjectOf: PropTypes.objectOf(PropTypes.number),
     optionalObjectWithShape: PropTypes.shape({
       color: PropTypes.string,
-      fontSize: PropTypes.number,
     }),
     requiredFunc: PropTypes.func.isRequired,
     requiredAny: PropTypes.any.isRequired,

transforms/__testfixtures__/class-flow6.output.js

@@ -17,7 +17,7 @@ class Component extends React.Component {
     optionalUnionOops?: any,
     optionalUnionOops2?: any,
     optionalArrayOf?: ?Array<number>,
-    optionalObjectOf?: ?{[key: string]: ?number,},
+    optionalObjectOf?: ?{[key: string]: ?number},
     optionalObjectWithShape?: ?{
       color?: ?string,
       fontSize?: any,