Update pull_request_template.md

Author: minikin

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

@@ -4,7 +4,7 @@ Please include a summary of the changes and the related issue.
 Please also include relevant motivation and context.
 List any dependencies that are required for this change.
 
-Fixes # (issue)
+Fixes # (issue) _if applicable_
 
 ## Type of change
 
@@ -17,13 +17,14 @@ Please delete options that are not relevant.
 
 ## How Has This Been Tested?
 
-Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. 
+Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.
 Please also list any relevant details for your test configuration
 
 - [ ] Test A
 - [ ] Test B
 
-**Test Configuration**:
+**Test Configuration**: _if applicable_
+
 * Firmware version:
 * Hardware:
 * Toolchain: