To automatically remove whitespace from all your files, add this to your text editor’s configuration file.
General syntax:
autocmd BufWritePre <filetype> :%s/\s\+$//e
I use vim, so I add this to my ~/.vimrc file
autocmd BufWritePre *.page :%s/\s\+$//e
That automatically removes all whitespaces when I save a file with :w
Also, you can check the diff of all new commits to be pushed to master with
git diff origin/branch-name
Some examples:
git diff origin/mallard-help
git diff origin/master