C++: Add another test for CommentedOutCode.ql

cpp/ql/test/query-tests/Documentation/CommentedOutCode/CommentedOutCode.expected

@@ -1,3 +1,7 @@
+| test2.cpp:13:1:13:33 | /* JSON example: {"foo":"bar"} */ | This comment appears to contain commented-out code |
+| test2.cpp:33:1:33:17 | // { 1, 2, 3, 4 } | This comment appears to contain commented-out code |
+| test2.cpp:35:1:35:26 | // Example: { 1, 2, 3, 4 } | This comment appears to contain commented-out code |
+| test2.cpp:37:1:37:39 | // int myFunction() { return myValue; } | This comment appears to contain commented-out code |
 | test.c:2:1:2:22 | // commented out code; | This comment appears to contain commented-out code |
 | test.c:4:1:7:8 | // some; | This comment appears to contain commented-out code |
 | test.c:9:1:13:8 | // also; | This comment appears to contain commented-out code |

cpp/ql/test/query-tests/Documentation/CommentedOutCode/test2.cpp

@@ -0,0 +1,37 @@
+/*
+ * This sentence contains a semicolon;
+ * however, this doesn't make it code.
+ */
+
+// This sentence contains a semicolon;
+// however, this doesn't make it code.
+
+/* Mention a ';' */
+
+/* Mention a '{' */
+
+/* JSON example: {"foo":"bar"} */
+
+/* JSON example in backticks: `{"foo":"bar"}` */
+
+/* JSON example in quotes: '{"foo":"bar"}' */
+
+/*
+ * Code example: `return 0;`.
+ */
+
+// Code example:
+//
+//     return 0;
+
+// Code example:
+//
+// ```
+// return 0;
+// ```
+
+// { 1, 2, 3, 4 }
+
+// Example: { 1, 2, 3, 4 }
+
+// int myFunction() { return myValue; }