Updating testing-overview.md (#6802)

A very very minor update, I think the testing-overview.md file is missing a square bracket at line #46.
WordPress · May 18, 2018 · e874187 · e874187
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commit e874187
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/docs/reference/testing-overview.md b/docs/reference/testing-overview.md
@@ -43,7 +43,7 @@ Keep your tests in a `test` folder in your working directory. The test file shou
 
 Only test files (with at least one test case) should live directly under `/test`. If you need to add external mocks or fixtures, place them in a sub folder, for example:
 
-* `test/mocks/[file-name.js`
+* `test/mocks/[file-name].js`
 * `test/fixtures/[file-name].js`
 
 ### Importing tests