fix(code/frontend): should match exactly the container name (elastic#39046) (elastic#39144)

Author: WangQianliang

Diff for: x-pack/plugins/code/public/reducers/__tests__/match_container_name.test.ts

@@ -7,6 +7,9 @@
 import { matchContainerName } from '../../utils/symbol_utils';
 
 describe('matchSymbolName', () => {
+  it('should match symbol whose name is exactly the container name', () => {
+    expect(matchContainerName('Session', 'Session')).toBe(true);
+  });
   it('should match symbol that has type annotation', () => {
     expect(matchContainerName('Session', 'Session<key, value>')).toBe(true);
   });

Diff for: x-pack/plugins/code/public/utils/symbol_utils.ts

@@ -5,4 +5,4 @@
  */
 
 export const matchContainerName = (containerName: string, symbolName: string) =>
-  new RegExp(`^${containerName}[[<(].*[>)]]?$`).test(symbolName);
+  new RegExp(`^${containerName}([<(].*[>)])?$`).test(symbolName);