Teach it about isort in addition to black

The design of this is starting to break down now and will need to be reworked
a bit.

do-reformat.sh

@@ -26,7 +26,7 @@ if [[ $file_type == "javascript" || \
     retval="$?"
     success_retval=0
 elif [[ $file_type == "python" ]]; then
-    out=$(pipx run black $file 2>/dev/null)
+    out=$(pipx run black $file 2>/dev/null && pipx run isort $file 2>/dev/null)
     retval="$?"
     success_retval=0
 else