Fix syntax.

src/test/resources/test_files/runtime/Updating/MultipleUpdatesObject5.jq

@@ -1,4 +1,4 @@
 (:JIQS: ShouldRun; Output="{ "b" : 2, "c" : 3, "d" : 4 }" :)
 copy $je := {"a": 1, "b": 2, "c": 3, "d": 4}
-modify (delete $je.a, replace value of $je.a with 5)
+modify (delete json $je.a, replace value of json $je.a with 5)
 return $je

src/test/resources/test_files/runtime/Updating/SimpleInsertErr10.jq

@@ -1,6 +1,6 @@
 (:JIQS: ShouldCrash; ErrorCode="JNUP0016"; ErrorMetadata="LINE:3:COLUMN:7:" :)
 copy $je := [1 to 4]
-modify insert 5 into $je at position 6
+modify insert json 5 into $je at position 6
 return $je
 
 (: selector expr does not evaluate to int within range of the target array :)

src/test/resources/test_files/runtime/Updating/SimpleUpdateErr1.jq

@@ -1,5 +1,5 @@
 (:JIQS: ShouldCrash; ErrorCode="RBDY0007"; ErrorMetadata="LINE:3:COLUMN:7:" :)
 let $data := {"bool" : true, "int": 10}
-return delete $data.bool
+return delete json $data.bool
 
 (: attempt to modify immutable variable :)

src/test/resources/test_files/runtime/Updating/UpdatingFLWORErr1.jq

@@ -1,9 +1,9 @@
 (:JIQS: ShouldCrash; ErrorCode="XUST0001"; ErrorMetadata="LINE:4:COLUMN:8:" :)
 copy $je := { "a" : {"foo" : 1}}
 modify
-    let $l := rename $je.a.foo as "b"
+    let $l := rename json $je.a.foo as "b"
     return
-        rename $l.foo as "b"
+        rename json $l.foo as "b"
 return $je
 
 (: expr in let clause is not simple :)

src/test/resources/test_files/runtime/Updating/UpdatingFunctionErr1.jq

@@ -3,6 +3,6 @@ declare updating function local:upsert($o as object, $key as string, $val as ite
     ()
 };
 copy $je := {"a" : 1, "b" : 2}
-modify local:upsert(insert "c" : 3 into $je, "c", 3)
+modify local:upsert(insert json "c" : 3 into $je, "c", 3)
 return $je
 (: argument of function call is not simple :)