Fix node types for fragments

`openingFragment` and `closingFragment` should be JSXOpeningFragment and JSXClosingFragment for JSX fragments

Author: ArtemGovorov

inject.js

@@ -289,21 +289,23 @@ module.exports = function(acorn) {
   pp.jsx_parseOpeningElementAt = function(startPos, startLoc) {
     var node = this.startNodeAt(startPos, startLoc);
     node.attributes = [];
-    node.name = this.jsx_parseElementName();
+    var nodeName = this.jsx_parseElementName();
+    if (nodeName) node.name = nodeName;
     while (this.type !== tt.slash && this.type !== tt.jsxTagEnd)
       node.attributes.push(this.jsx_parseAttribute());
     node.selfClosing = this.eat(tt.slash);
     this.expect(tt.jsxTagEnd);
-    return this.finishNode(node, 'JSXOpeningElement');
+    return this.finishNode(node, nodeName ? 'JSXOpeningElement' : 'JSXOpeningFragment');
   };
 
   // Parses JSX closing tag starting after '</'.
 
   pp.jsx_parseClosingElementAt = function(startPos, startLoc) {
     var node = this.startNodeAt(startPos, startLoc);
-    node.name = this.jsx_parseElementName();
+    var nodeName = this.jsx_parseElementName();
+    if (nodeName) node.name = nodeName;
     this.expect(tt.jsxTagEnd);
-    return this.finishNode(node, 'JSXClosingElement');
+    return this.finishNode(node, nodeName ? 'JSXClosingElement' : 'JSXClosingFragment');
   };
 
   // Parses entire JSX element, including it's opening tag

test/tests-jsx.js

@@ -3216,7 +3216,7 @@ var fbTestFixture = {
         },
         range: [0, 16],
         openingElement: {
-          type: 'JSXOpeningElement',
+          type: 'JSXOpeningFragment',
           start: 0,
           end: 2,
           loc: {
@@ -3231,11 +3231,10 @@ var fbTestFixture = {
           },
           range: [0, 2],
           attributes: [],
-          name: '',
           selfClosing: false
         },
         closingElement: {
-          type: 'JSXClosingElement',
+          type: 'JSXClosingFragment',
           start: 13,
           end: 16,
           loc: {
@@ -3248,8 +3247,7 @@ var fbTestFixture = {
               column: 16
             }
           },
-          range: [13, 16],
-          name: ''
+          range: [13, 16]
         },
         children: [{
           type: 'JSXElement',