update elements and fix some bugs

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

Index: lib/src/prism/tests/languages/rust/operator_feature.test
diff --git a/lib/src/prism/tests/languages/rust/operator_feature.test b/lib/src/prism/tests/languages/rust/operator_feature.test
new file mode 100644
index 0000000000000000000000000000000000000000..a6e0892c8895a6b6e7fb81921343cfe20850e0d1
--- /dev/null
+++ b/lib/src/prism/tests/languages/rust/operator_feature.test
@@ -0,0 +1,35 @@
++ +=
+- -=
+* *=
+/ /=
+% %=
+! !=
+^ ^=
+= ==
+& && &=
+| || |=
+< << <= <<=
+> >> >= >>=
+@
+
+----------------------------------------------------
+
+[
+	["operator", "+"], ["operator", "+="],
+	["operator", "-"], ["operator", "-="],
+	["operator", "*"], ["operator", "*="],
+	["operator", "/"], ["operator", "/="],
+	["operator", "%"], ["operator", "%="],
+	["operator", "!"], ["operator", "!="],
+	["operator", "^"], ["operator", "^="],
+	["operator", "="], ["operator", "=="],
+	["operator", "&"], ["operator", "&&"], ["operator", "&="],
+	["operator", "|"], ["operator", "||"], ["operator", "|="],
+	["operator", "<"], ["operator", "<<"], ["operator", "<="], ["operator", "<<="],
+	["operator", ">"], ["operator", ">>"], ["operator", ">="], ["operator", ">>="],
+	["operator", "@"]
+]
+
+----------------------------------------------------
+
+Checks for all operators.