diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index b339cea..a303263 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -14,7 +14,7 @@ Please refer to an issue here or describe the change thoroughly in your PR.
 
 
 ## If it's a code change please check the boxes which are applicable
-- [ ] For the main program: My edits contain no tabs and the indentation is five spaces
+- [ ] For the main program: My edits contain no tabs, indentation is five spaces and the line ending do not contain any blank chars
 - [ ] I've read CONTRIBUTING.md and Coding_Convention.md 
 - [ ] I have tested this __fix__ or __improvement__ against >=2 hosts and I couldn't spot a problem
 - [ ] I have tested this __new feature__ against >=2 hosts which show this feature and >=2 host which does not (in order to avoid side effects) . I couldn't spot a problem