More tweaks to contributing guidelines.

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 ## Contributing to The Art of Command Line
 
-This guide is a [collaborative effort](AUTHORS.md), based on the generous work of dozens contributors.
+This guide is a [collaborative effort](AUTHORS.md), based on the generous work of many contributors.
 
 Contributions of all kinds, including corrections, additions, improvements, and translations, are welcome!
 
@@ -19,6 +19,7 @@ Here are few notes before you jump in.
 - Please **review open issues and pull requests** before submitting a new one, to help reduce duplication.
 - To the extent possible, **break up changes into multiple PRs** so they can be approved separately. Large contributions are also welcome, but are harder and slower to approve, as they tend to require discussion or rewriting.
 
+
 ## Translations
 
 Maintaining the guide in several languages is a little confusing, so here is the process:
@@ -44,5 +45,8 @@ Translations to new languages are always welcome, especially if you can maintain
 - Invite friends to review if possible. If desired, feel free to invite friends to help your original translation by letting them fork your repo, then merging their PRs.
 - When done, indicate on the PR that it's ready to be merged into the main repo.
 
-Further questions on process or want to volunteer to help in some other way?
-File an issue or e-mail the original author @jlevy.
+### Further questions
+
+Unsure of the process?
+Or do you have skills and inclination to help in a more substantial way?
+File an issue or e-mail the original author [@jlevy](https://github.com/jlevy).