[clang-format] Releasenotes for rL319024 : Add option to group multiple #include blocks when sorting includes

[KrzysztofKapusta]

Summary

This change adds missing releasenotes for commit rL319024
https://reviews.llvm.org/rL319024

Patch by Krzysztof Kapusta

[KrzysztofKapusta]

@sylvestre.ledru Thanks. I don't have commit rights, so I would really appreciate if you could push this for me.

[sylvestre.ledru]

Done!
btw, you should probably request commit permissions ;)

[KrzysztofKapusta]

Thanks! Will probably do in the future. This was my first change to clang-format.

docs/ReleaseNotes.rst

* Option *IndentPPDirectives* added to indent preprocessor directives on
   |    #include <foo>    |   #    include <foo> |
   |    #endif            |   #  endif           |
   |    #endif            |   #endif             |
   +----------------------+----------------------+
 
 * Option -verbose added to the command line.
   Shows the list of processed files.
 
+* Option *IncludeBlocks* added to merge and regroup multiple ``#include`` blocks during sorting.
+
+  +-------------------------+-------------------------+-------------------------+
+  | Before (Preserve)       | Merge                   | Regroup                 |
+  +=========================+=========================+=========================+
+  |  .. code-block:: c++    | .. code-block:: c++     | .. code-block:: c++     |
+  |                         |                         |                         |
+  |   #include "b.h"        |   #include "a.h"        |   #include "a.h"        |
+  |                         |   #include "b.h"        |   #include "b.h"        |
+  |   #include "a.b"        |   #include <lib/main.h> |                         |
+  |   #include <lib/main.h> |                         |   #include <lib/main.h> |
+  +-------------------------+-------------------------+-------------------------+
+
 libclang
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