Adjust GitHub templates with commented lines

.github/ISSUE_TEMPLATE.md

@@ -1,16 +1,15 @@
-Please check if a similar issue already exists or has been closed before before opening your issue.
+<!-- Please check if a similar issue already exists or has been closed before before opening your issue. -->
 
 ### Description
-
-[Description of the bug or feature]
+<!-- Provide a general description of the bug or feature -->
 
 ### Expected behavior
 
-[What you expected to happen]
+<!-- What you expected to happen -->
 
 ### Actual behavior
 
-[What actually happened]
+<!-- What actually happened -->
 
 ### Steps to Reproduce
 

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,4 +1,5 @@
-Please be sure to check out our [contributing guidelines](https://github.com/sorin-ionescu/prezto/blob/master/CONTRIBUTING.md) before submitting your pull request.
+Please be sure to check out our [contributing guidelines](https://github.com/sorin-ionescu/prezto/blob/master/CONTRIBUTING.md)
+before submitting your pull request.
 
 Fixes #