Jsonnetfmt needs to be run multiple time to fix a file

[graywolf-at-work]

+$ printf '{}\n//\n' >a.jsonnet
+$ cp a.jsonnet orig.jsonnet
+$ while ! jsonnetfmt --test a.jsonnet; do
+> jsonnetfmt -i a.jsonnet
+> diff -u orig.jsonnet a.jsonnet
+> done
--- orig.jsonnet        2021-01-19 23:26:35.129851360 +0100
+++ a.jsonnet   2021-01-19 23:28:04.271007497 +0100
@@ -1,2 +1,3 @@
 {}
 //
+
--- orig.jsonnet        2021-01-19 23:26:35.129851360 +0100
+++ a.jsonnet   2021-01-19 23:28:04.811014462 +0100
@@ -1,2 +1,4 @@
 {}
 //
+
+
--- orig.jsonnet        2021-01-19 23:26:35.129851360 +0100
+++ a.jsonnet   2021-01-19 23:28:05.321021040 +0100
@@ -1,2 +1,5 @@
 {}
 //
+
+
+
+$

[sbarzowski]

Thanks. This is a bug. The formatter is supposed to be idempotent (i.e. forall(input) . formatter(formatter(input)) = formatter(input)).