revert unnecessary change

ajafff · ajafff · commit 11837f010916 · 2018-06-30T22:33:44.000+02:00
diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
@@ -4340,7 +4340,7 @@ namespace ts {
         }
     }
 
-    function getLeftmostExpression(node: Expression, stopAtCallExpressions: boolean | undefined) {
+    function getLeftmostExpression(node: Expression, stopAtCallExpressions: boolean) {
         while (true) {
             switch (node.kind) {
                 case SyntaxKind.PostfixUnaryExpression:

Original file line number	Diff line number	Diff line change
`@@ -4340,7 +4340,7 @@ namespace ts {`
`4340`	`4340`	`}`
`4341`	`4341`	`}`
`4342`	`4342`
`4343`		`- function getLeftmostExpression(node: Expression, stopAtCallExpressions: boolean \| undefined) {`
	`4343`	`+ function getLeftmostExpression(node: Expression, stopAtCallExpressions: boolean) {`
`4344`	`4344`	`while (true) {`
`4345`	`4345`	`switch (node.kind) {`
`4346`	`4346`	`case SyntaxKind.PostfixUnaryExpression:`