fix/add-tests+note-in-import-lesson

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-an-export-fallback-with-export-default.english.md

@@ -30,7 +30,7 @@ The following function should be the fallback value for the module. Please add t
 ```yml
 tests:
   - text: Your code should use <code>export</code> fallback.
-    testString: assert(code.match(/export\s+default\s+function\s+subtract\s*\(\s*x,\s*y\s*\)\s*{/g));
+    testString: assert(code.match(/export\s+default\s+function(\s+subtract\s*|\s*)\(\s*x,\s*y\s*\)\s*{/g));
 ```
 
 </section>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.english.md

@@ -12,12 +12,12 @@ In the last challenge, you learned about <code>export default</code> and its use
 import add from "./math_functions.js";
 ```
 
-The syntax differs in one key place. The imported value, <code>add</code>, is not surrounded by curly braces (<code>{}</code>). The primary method of importing a default export is to simply write the value's name after <code>import</code>.
+The syntax differs in one key place. The imported value, <code>add</code>, is not surrounded by curly braces (<code>{}</code>). <code>add</code> here is simply a variable name for whatever the default export of the <code>math_functions.js</code> file is. You can use any name here when importing a default.
 </section>
 
 ## Instructions
 <section id='instructions'>
-In the following code, import the default export, <code>subtract</code>, from the file <code>math_functions.js</code>, found in the same directory as this file.
+In the following code, import the default export from the <code>math_functions.js</code> file, found in the same directory as this file. Give the import the name <code>subtract</code>.
 </section>
 
 ## Tests