Merge pull request #226910 from microsoft/andreamah/issue226830

Files to exclude doesn't work if using multiple extensions

Author: andreamah

src/vs/workbench/services/search/common/queryBuilder.ts

@@ -239,7 +239,8 @@ export class QueryBuilder {
 
 	private commonQuery(folderResources: (IWorkspaceFolderData | URI)[] = [], options: ICommonQueryBuilderOptions = {}): ICommonQueryProps<uri> {
 
-		const excludePatterns = Array.isArray(options.excludePattern) ? options.excludePattern.map(p => p.pattern).flat() : options.excludePattern;
+		let excludePatterns: string | string[] | undefined = Array.isArray(options.excludePattern) ? options.excludePattern.map(p => p.pattern).flat() : options.excludePattern;
+		excludePatterns = excludePatterns?.length === 1 ? excludePatterns[0] : excludePatterns;
 		const includeSearchPathsInfo: ISearchPathsInfo = this.handleIncludeExclude(options.includePattern, options.expandPatterns);
 		const excludeSearchPathsInfo: ISearchPathsInfo = this.handleIncludeExclude(excludePatterns, options.expandPatterns);