Fix files without blank newline

bin/steps/mercurial

@@ -3,4 +3,4 @@ if (grep -Fiq "hg+" requirements.txt) then
   bpwatch start mercurial_install
     /app/.heroku/python/bin/pip install  mercurial | cleanup | indent
   bpwatch stop mercurial_install
-fi
+fi

bin/steps/pip-uninstall

@@ -15,4 +15,4 @@ if [[ -f .heroku/python/requirements-declared.txt ]]; then
   fi
 fi
 bpwatch stop pip_uninstall
-set -e
+set -e