escape ref parameter for repo_file_contents
escape ref parameter for repo_file_contents

fixes #113

raine/gitlab,yonglehou/gitlab,marc-ta/gitlab,ondra-m/gitlab,aaam/gitlab,yonglehou/gitlab,aaam/gitlab,agops/gitlab,NARKOZ/gitlab,nanofi/gitlab,NARKOZ/gitlab,nanofi/gitlab,marc-ta/gitlab,ondra-m/gitlab,raine/gitlab,michaellihs/gitlab,michaellihs/gitlab,agops/gitlab