update elements and fix some bugs

lib/src/prism/tests/languages/prolog/operator_feature.test

Index: lib/src/prism/tests/languages/prolog/operator_feature.test
diff --git a/lib/src/prism/tests/languages/prolog/operator_feature.test b/lib/src/prism/tests/languages/prolog/operator_feature.test
new file mode 100644
index 0000000000000000000000000000000000000000..8964b34d8370f8bed388b8288c34face5aa374a0
--- /dev/null
+++ b/lib/src/prism/tests/languages/prolog/operator_feature.test
@@ -0,0 +1,29 @@
+is mod not xor
+
+: \ =
+> < -
+? * @
+/ ; +
+^ | !
+$ .
+
+=@=
+
+----------------------------------------------------
+
+[
+	["operator", "is"], ["operator", "mod"], ["operator", "not"], ["operator", "xor"],
+
+	["operator", ":"], ["operator", "\\"], ["operator", "="],
+	["operator", ">"], ["operator", "<"], ["operator", "-"],
+	["operator", "?"], ["operator", "*"], ["operator", "@"],
+	["operator", "/"], ["operator", ";"], ["operator", "+"],
+	["operator", "^"], ["operator", "|"], ["operator", "!"],
+	["operator", "$"], ["operator", "."],
+
+	["operator", "=@="]
+]
+
+----------------------------------------------------
+
+Checks for operators.