[clang-tidy] Fix documentation generation.

[etienneb]

Summary

The patch is fixing the generation of clang-tidy documentation.

[etienneb]

right fix.

[alexfh]

LG. Thank you!

clang-tools-extra/trunk/docs/ReleaseNotes.rst

- Updated ``cppcoreguidelines-pro-member-type-member-init`` check
   This check now conforms to C++ Core Guidelines rule Type.6: Always Initialize
   a Member Variable. The check examines every record type where construction
   might result in an undefined memory state. These record types needing
   initialization have at least one default-initialized built-in, pointer,
   array or record type matching these criteria or a default-initialized
   direct base class of this kind.
 
   The check has two complementary aspects:
+
   1. Ensure every constructor for a record type needing initialization
      value-initializes all members and direct bases via a combination of
      in-class initializers and the member initializer list.
   2. Value-initialize every non-member instance of a record type needing
      initialization that lacks a user-provided default constructor, e.g.
      a POD.
 
 Improvements to modularize
 --------------------------
 
 The improvements are...

clang-tools-extra/trunk/docs/clang-tidy/checks/readability-deleted-default.rst

 .. title:: clang-tidy - readability-deleted-default
 
 readability-deleted-default
 ===========================
 
 Checks that constructors and assignment operators marked as ``= default`` are
 not actually deleted by the compiler.
 
 .. code:: c++
+
   class Example {
   public:
     // This constructor is deleted because I is missing a default value.
     Example() = default;
     // This is fine.
     Example(const Example& Other) = default;
     // This operator is deleted because I cannot be assigned (it is const).
     Example& operator=(const Example& Other) = default;
   private:
     const int I;
   };