Added missing quotation marks in ios testing documentation

Change-Id: I220b461c1d734a51f3f906380e4f0cef773b86a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3498529
Reviewed-by: Tommy Martino <[email protected]>
Commit-Queue: Ernesto Izquierdo Clua <[email protected]>
Cr-Commit-Position: refs/heads/main@{#976376}
diff --git a/docs/ios/testing.md b/docs/ios/testing.md
index 5a26ddf..d1b2b46 100644
--- a/docs/ios/testing.md
+++ b/docs/ios/testing.md
@@ -29,7 +29,7 @@
 
     * You’ll have to include:
     ```
-    #import "ios/chrome/test/earl_grey/chrome_test_case.h
+    #import "ios/chrome/test/earl_grey/chrome_test_case.h"
     ```
     * You’ll most likely find util functions in these files helpful.
     ```