Wrap conditionals and await in parens in spread property (#3681)

src/common/fast-path.js

@@ -435,6 +435,7 @@ FastPath.prototype.needsParens = function(options) {
         case "LogicalExpression":
         case "SpreadElement":
         case "SpreadProperty":
+        case "ExperimentalSpreadProperty":
         case "TSAsExpression":
         case "TSNonNullExpression":
           return true;
@@ -546,6 +547,7 @@ FastPath.prototype.needsParens = function(options) {
         case "UnaryExpression":
         case "SpreadElement":
         case "SpreadProperty":
+        case "ExperimentalSpreadProperty":
         case "BinaryExpression":
         case "LogicalExpression":
         case "ExportDefaultDeclaration":

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

@@ -3,8 +3,14 @@
 exports[`spread.js 1`] = `
 const foo = { ...(a || b) };
 const foo2 = { ...a || b };
+const foo3 = { ...(a ? b : c) };
+
+async () => ({ ...(await foo) });
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 const foo = { ...(a || b) };
 const foo2 = { ...(a || b) };
+const foo3 = { ...(a ? b : c) };
+
+async () => ({ ...(await foo) });
 
 `;

tests/spread/spread.js

@@ -1,2 +1,5 @@
 const foo = { ...(a || b) };
 const foo2 = { ...a || b };
+const foo3 = { ...(a ? b : c) };
+
+async () => ({ ...(await foo) });