test: add the result variable definition

Author: aminya

.eslintrc.json

@@ -9,6 +9,8 @@
     "no-promise-executor-return": "off",
     "no-unreachable-loop": "off",
     "no-useless-backreference": "off",
-    "default-case-last": "off"
+    "default-case-last": "off",
+    // errors
+    "no-undef": "error"
   }
 }

spec/results-model-spec.js

@@ -137,7 +137,7 @@ describe("ResultsModel", () => {
 
       advanceClock(editor.buffer.stoppedChangingDelay)
       editor.getBuffer().destroy()
-      result = resultsModel.getResult(editor.getPath())
+      const result = resultsModel.getResult(editor.getPath())
 
       expect(Number.isInteger(reporterSpy.sendSearchEvent.calls[0].args[0])).toBeTruthy()
       expect(reporterSpy.sendSearchEvent.calls[0].args[1]).toBe(6)