Merge pull request #9162 from SehyunPark/patch-8

Update index.md

docs/contents/getting_started/index.md

@@ -113,8 +113,8 @@ PDF.js is hosted on several free CDNs:
 
 ## Trying the Viewer
 
-With the prebuilt or source version open `web/viewer.html` in a browser and the test pdf should load. Note: the worker is not enabled for file:// urls, so use a server. If you're using the source build and have node, you can run `gulp server`.
+With the prebuilt or source version, open `web/viewer.html` in a browser and the test pdf should load. Note: the worker is not enabled for file:// urls, so use a server. If you're using the source build and have node, you can run `gulp server`.
 
 ## More Information
 
-For a further walkthrough of a minimal viewer see the hello world example. More documentation can be found in our [wiki](https://github.com/mozilla/pdf.js/wiki) too.
+For a further walkthrough of a minimal viewer, see the hello world example. More documentation can be found in our [wiki](https://github.com/mozilla/pdf.js/wiki) too.