tweak the AssetMapper docs

Author: xabbuh

frontend/asset_mapper.rst

@@ -406,7 +406,7 @@ CSS can be added to your page by importing it from a JavaScript file. The defaul
     // ...
 
 When you call ``importmap('app')`` in ``base.html.twig``, AssetMapper parses
-``assets/app.js`` (and any JavaScript files that *it* imports) looking for ``import``
+``assets/app.js`` (and any JavaScript files that it imports) looking for ``import``
 statements for CSS files. The final collection of CSS files is rendered onto
 the page as ``link`` tags in the order they were imported.
 
@@ -513,7 +513,7 @@ Missing importmap Entry
 ~~~~~~~~~~~~~~~~~~~~~~~
 
 One of the most common errors will come from your browser's console, and
-will something like this:
+will look something like this:
 
     Failed to resolve module specifier "    bootstrap". Relative references must start
     with either "/", "./", or "../".