Fix lint error

ahejlsberg · ahejlsberg · commit 163ba2fbd484 · 2020-03-05T09:32:08.000-08:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -13602,7 +13602,7 @@ namespace ts {
         function combineTypeMappers(mapper1: TypeMapper | undefined, mapper2: TypeMapper): TypeMapper;
         function combineTypeMappers(mapper1: TypeMapper, mapper2: TypeMapper | undefined): TypeMapper;
         function combineTypeMappers(mapper1: TypeMapper, mapper2: TypeMapper): TypeMapper {
-            return !mapper1 ? mapper2 : !mapper2 ?  mapper1 : makeCompositeTypeMapper(mapper1, mapper2);
+            return !mapper1 ? mapper2 : !mapper2 ? mapper1 : makeCompositeTypeMapper(mapper1, mapper2);
         }
 
         function createReplacementMapper(source: Type, target: Type, baseMapper: TypeMapper): TypeMapper {

Original file line number	Diff line number	Diff line change
`@@ -13602,7 +13602,7 @@ namespace ts {`
`13602`	`13602`	`function combineTypeMappers(mapper1: TypeMapper \| undefined, mapper2: TypeMapper): TypeMapper;`
`13603`	`13603`	`function combineTypeMappers(mapper1: TypeMapper, mapper2: TypeMapper \| undefined): TypeMapper;`
`13604`	`13604`	`function combineTypeMappers(mapper1: TypeMapper, mapper2: TypeMapper): TypeMapper {`
`13605`		`- return !mapper1 ? mapper2 : !mapper2 ? mapper1 : makeCompositeTypeMapper(mapper1, mapper2);`
	`13605`	`+ return !mapper1 ? mapper2 : !mapper2 ? mapper1 : makeCompositeTypeMapper(mapper1, mapper2);`
`13606`	`13606`	`}`
`13607`	`13607`
`13608`	`13608`	`function createReplacementMapper(source: Type, target: Type, baseMapper: TypeMapper): TypeMapper {`