addressed comments

Author: isuckatcs

clang-tools-extra/docs/clang-tidy/checks/portability/template-virtual-member-function.rst

@@ -3,11 +3,12 @@
 portability-template-virtual-member-function
 ============================================
 
+Finds cases when an uninstantiated virtual member function in a template class causes 
+cross-compiler incompatibility.
+
 Upon instantiating a template class, non-virtual member functions don't have to be 
 instantiated unless they are used. Virtual member function instantiation on the other hand 
-is unspecified and depends on the implementation of the compiler. This check intends to find 
-cases when a virtual member function is not instantiated but it might be with a different 
-compiler.
+is unspecified and depends on the implementation of the compiler.
 
 In the following snippets the virtual member function is not instantiated by GCC and Clang,
 but it is instantiated by MSVC, so while the snippet is accepted by the former compilers,