Update ISSUE_TEMPLATE.md

Request more specifics.

.github/ISSUE_TEMPLATE.md

 * gevent version:
-* Python version:
-* Operating System:
+* Python version: Please be as specific as possible: "cPython 2.7.9 downloaded from python.org"
+* Operating System: Please be as specific as possible: "Raspbian (Debian Linux 8.0 Linux 4.9.35-v7+  armv7l)"
 
 ### Description:
 
+**REPLACE ME**: What are you trying to get done, what has happened, what went wrong, and what did you expect?
+
 ```
-// REPLACE ME: What are you trying to get done, what has happened, what went wrong, and what did you expect?
+Remember to put tracebacks in literal blocks
 ```
 
 ### What I've run:
 
-```
-// REPLACE ME: Paste short, self contained, correct example code (sscce.org), tracebacks, etc, here
+**REPLACE ME**: Paste short, self contained, correct example code (sscce.org), tracebacks, etc, here
+
+
+```python
+"Put python code in python blocks"
 ```