Fix leading comment inside returned SequenceExpression (#1133)

src/printer.js

@@ -3255,7 +3255,6 @@ function hasLeadingOwnLineComment(text, node) {
     node.comments.some(
       comment =>
         comment.leading &&
-        util.hasNewline(text, util.locStart(comment), { backwards: true }) &&
         util.hasNewline(text, util.locEnd(comment))
     );
   return res;

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

@@ -839,6 +839,12 @@ function sequenceExpression() {
   ), b
 }
 
+function sequenceExpressionInside() {
+  return ( // Reason for a
+    a, b
+  );
+}
+
 function taggedTemplate() {
   return (
     // Reason for a
@@ -963,6 +969,13 @@ function sequenceExpression() {
   );
 }
 
+function sequenceExpressionInside() {
+  return (
+    // Reason for a
+    a, b
+  );
+}
+
 function taggedTemplate() {
   return (
     // Reason for a

tests/comments/return-statement.js

@@ -100,6 +100,12 @@ function sequenceExpression() {
   ), b
 }
 
+function sequenceExpressionInside() {
+  return ( // Reason for a
+    a, b
+  );
+}
+
 function taggedTemplate() {
   return (
     // Reason for a