don't append a newline to the last switchcase

lib/babel/generation/generators/statements.js

@@ -148,7 +148,14 @@ exports.SwitchStatement = function (node, print) {
   this.push(")");
   this.space();
   this.push("{");
-  print.sequence(node.cases, { indent: true });
+
+  print.sequence(node.cases, {
+    indent: true,
+    addNewlines: function (leading, cas) {
+      if (!leading && node.cases[node.cases.length - 1] === cas) return -1;
+    }
+  });
+
   this.push("}");
 };
 

lib/babel/generation/index.js

@@ -174,6 +174,7 @@ CodeGenerator.prototype.print = function (node, parent, opts) {
     } else {
       // generated node
       if (!leading) lines++; // always include at least a single line after
+      if (opts.addNewlines) lines += opts.addNewlines(leading, node) || 0;
 
       var needs = n.needsWhitespaceAfter;
       if (leading) needs = n.needsWhitespaceBefore;
@@ -234,6 +235,7 @@ CodeGenerator.prototype.printJoin = function (print, nodes, opts) {
   each(nodes, function (node, i) {
     print(node, {
       statement: opts.statement,
+      addNewlines: opts.addNewlines,
       after: function () {
         if (opts.iterator) {
           opts.iterator(node, i);