Fix refactoring mistake

Author: andrewbranch

src/services/formatting/formatting.ts

@@ -445,7 +445,7 @@ namespace ts.formatting {
                 undefined;
 
             if (tokenInfo) {
-                const parent = findPrecedingToken(tokenInfo.end, sourceFile, enclosingNode) || previousParent!;
+                const parent = findPrecedingToken(tokenInfo.end, sourceFile, enclosingNode)?.parent || previousParent!;
                 processPair(
                     tokenInfo,
                     sourceFile.getLineAndCharacterOfPosition(tokenInfo.pos).line,

tests/cases/fourslash/server/formatOnTypeOpenCurlyWithBraceCompletion.ts renamed to tests/cases/fourslash/formatOnTypeOpenCurlyWithBraceCompletion.ts

@@ -1,4 +1,4 @@
-/// <reference path="../fourslash.ts"/>
+/// <reference path="fourslash.ts"/>
 
 //// if (foo) {
 ////     if (bar) {/**/}