Don't mix tab and spaces in shell script

Sometime ago I was in python mode and incorrectly indented a line of the
shell script with spaces instead of tabs. Shame on me. This should bring
things back to their natural order.

run

@@ -2,7 +2,7 @@
 if python3.5 -V 2>/dev/null; then
 	exec python3.5 -m "sshuttle" "$@"
 elif python2.7 -V 2>/dev/null; then
-    exec python2.7 -m "sshuttle" "$@"
+	exec python2.7 -m "sshuttle" "$@"
 else
 	exec python -m "sshuttle" "$@"
 fi