Give an example in the documentation

Author: Tom James

clang-tools-extra/docs/clang-tidy/checks/bugprone/method-hiding.rst

@@ -7,4 +7,24 @@ Finds derived class methods that hide a (non-virtual) base class method.
 
 In order to be considered "hiding", methods must have the same signature
 (i.e. the same name, same number of parameters, same parameter types, etc).
-Only checks public, non-templated methods. 
+Only checks public, non-templated methods. 
+
+The below example is bugprone because consumers of the `Derived` class will
+expect the `reset` method to do the work of `Base::reset()` in addition to extra
+work required to reset the `Derived` class.  Common fixes include:
+- Making the `reset` method polymorphic
+- Re-naming `Derived::reset` if it's not meant to intersect with `Base::reset`
+- Using `using Base::reset` to change the access specifier
+
+This is also a violation of the Liskov Substitution Principle.
+
+.. code-block:: c++
+
+  class Base {
+    void reset() {/* reset the base class */};
+  };
+
+  class Derived : public Base {
+  public:
+    void reset() {/* reset the derived class, but not the base class */};
+  };