Fixed Documentation Typo

Author: SHAMIKH-ANWAR

contributor_docs/preparing_a_pull_request.md

@@ -51,7 +51,7 @@ Then ask git about the latest changes.
     git status       
 
 ## Pull Request Templates
-Once you've opened your pull request, please ensure that you follow the guidelines and 
+Once you've opened your pull request, please ensure that you follow the guidelines.
 
 ## CONFLICTS
 You may have some conflicts! It's okay. Feel free to ask for help. If merging with the latest upstream `develop` branch causes conflicts, you can always make a pull request with the upstream repository, which makes the merge conflicts public.