fixes dynamic imports (#2748)

.gitignore

@@ -9,3 +9,4 @@ npm-debug.log
 /website/node_modules
 .DS_Store
 coverage
+.idea

src/comments.js

@@ -30,7 +30,9 @@ function getSortedChildNodes(node, text, resultArray) {
         node.type !== "Line" &&
         node.type !== "Block" &&
         node.type !== "EmptyStatement" &&
-        node.type !== "TemplateElement") ||
+        node.type !== "TemplateElement" &&
+        node.type !== "Import" &&
+        !(node.callee && node.callee.type === "Import")) ||
         (node.kind && node.kind !== "Comment"))
     ) {
       // This reverse insertion sort almost always takes constant

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

@@ -208,6 +208,25 @@ for (;;);
 
 `;
 
+exports[`dynamic_imports.js 1`] = `
+import(/* Hello */ 'something')
+
+import('something' /* Hello */)
+
+import(/* Hello */ 'something' /* Hello */)
+
+import('something' /* Hello */ + 'else')
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+import(/* Hello */ "something");
+
+import("something" /* Hello */);
+
+import(/* Hello */ "something" /* Hello */);
+
+import("something" /* Hello */ + "else");
+
+`;
+
 exports[`export.js 1`] = `
 export //comment
 {}

tests/comments/dynamic_imports.js

@@ -0,0 +1,7 @@
+import(/* Hello */ 'something')
+
+import('something' /* Hello */)
+
+import(/* Hello */ 'something' /* Hello */)
+
+import('something' /* Hello */ + 'else')