small tweaks to issue template text

Author: mr-c

.github/ISSUE_TEMPLATE.md

@@ -1,10 +1,10 @@
-Issue tracker is a tool to address bugs in cwltool (reference implementation) itself.
+This issue tracker is for reporting bugs in cwltool (the CWL reference implementation) itself.
 Please use the [Gitter channel](https://gitter.im/common-workflow-language/common-workflow-language) or [Biostars forum](https://www.biostars.org/) 
 for general questions about using cwltool to create/run workflows or issues not related to cwltool. Don't forget to use cwl tag when posting on Biostars Forum.
 
 If you'd like to report a bug, fill out the template below and provide
 any extra information that may be useful / related to your problem.
-Ideally, you create an [MCVE](http://stackoverflow.com/help/mcve) reproducing
+Ideally, you create an [a Minimal, Complete, and Verifiable example](http://stackoverflow.com/help/mcve) reproducing
 the problem before opening an issue to ensure it's not caused by something in
 your code.