This app was mentioned in 2 comments, with an average of 2.00 upvotes
I found this after a little bit of searching. Might be what you're looking for.
This is an extra step but you could open the file in Google docs, select all the text, copy it and paste it into a text editor app on your phone. Not exactly what you are looking for but it would work right?
https://play.google.com/store/apps/details?id=com.JellyBeanUser.apk.app.editor