Fix Map formatting (#1312)

pkl-formatter/src/test/files/FormatterSnippetTests/input/map-function.pkl

@@ -2,3 +2,19 @@
 foo = Map(1000, "some random string", 20000, "another random string", 30000, "yet another random string")
 
 incorrect = Map("This has", 1000000, "an incorrect number", 2000000, "of parameters", 30000000, "passed to Map")
+
+bar =
+  Map(
+    // leading
+    1,
+    2,
+    // between
+    3,
+    4, // trailing
+    5,
+    6,
+    7, // mid
+    8,
+    9,
+    10
+  )