Use and recommend clang-format-11, not clang-format-10

Also:
- Fix the numbered list formatting in the README.md
- Describe the -DVULKAN_HPP_RUN_GENERATOR=ON option

Fixes: #1116

CMakeLists.txt

@@ -43,12 +43,12 @@ if(CLANG_FORMAT_EXECUTABLE)
   else ()
 	message(STATUS " Found clang-format version <" ${clangFormatVersion} ">.")
 	add_definitions(-DCLANG_FORMAT_EXECUTABLE="${CLANG_FORMAT_EXECUTABLE}")
-	if (clangFormatVersion VERSION_LESS 10.0.0)
+	if (clangFormatVersion VERSION_LESS 11.0.0)
 		message(STATUS " Using .clang-format version 7." )
 		file(READ ".clang-format_7" clangFormat)
 	else ()
-		message(STATUS " Using .clang-format version 10." )
+		message(STATUS " Using .clang-format version 11." )
-		file(READ ".clang-format_10" clangFormat)
+		file(READ ".clang-format_11" clangFormat)
 	endif ()
 	file(WRITE ".clang-format" ${clangFormat})
   endif()

README.md

@@ -22,17 +22,22 @@ Vulkan-Hpp requires a C++11 capable compiler to compile. The following compilers
 
 To build the local samples and tests you'll have to clone this repository and run CMake to generate the required build files
 
-0.) Ensure that you have CMake and git installed and accessible from a shell. Ensure that you have installed the Vulkan SDK. Optionally install clang-format >= 10.0 to get a nicely formatted Vulkan-Hpp header.
+0. Install dependencies.
-1.) Open a shell which provides git and clone the repository with:
+   * Ensure that you have CMake and git installed and accessible from a shell.
-```git clone --recurse-submodules https://github.com/KhronosGroup/Vulkan-Hpp.git```
+   * Ensure that you have installed the Vulkan SDK.
-2.) Change the current directory to the newly created Vulkan-Hpp directory.
+   * Optionally install clang-format >= 11.0 to get a nicely formatted Vulkan-Hpp header.
-3.) Create a new folder named ```build``` and change the current directory to the newly created folder.
+1. Open a shell which provides git and clone the repository with:
-4.) Create a build environment with CMake
+    ```git clone --recurse-submodules https://github.com/KhronosGroup/Vulkan-Hpp.git```
-```cmake -D DSAMPLES_BUILD_WITH_LOCAL_VULKAN_HPP=ON -DSAMPLES_BUILD=ON -DTESTS_BUILD_WITH_LOCAL_VULKAN_HPP=ON -DTESTS_BUILD=ON -G "<generator>" ..```
+2. Change the current directory to the newly created Vulkan-Hpp directory.
-For a full list of generators execute ```cmake -G```.
+3. Create a new folder named ```build``` and change the current directory to the newly created folder.
-5.) Either open the generated project with an IDE, e.g. Visual Studio or launch the build process with ```cmake --build .```.
+4. Create a build environment with CMake
+    ```cmake -D DSAMPLES_BUILD_WITH_LOCAL_VULKAN_HPP=ON -DSAMPLES_BUILD=ON -DTESTS_BUILD_WITH_LOCAL_VULKAN_HPP=ON -DTESTS_BUILD=ON -G "<generator>" ..```
+    For a full list of generators execute ```cmake -G```.
+    *  To rebuild `vulkan.hpp` from the `vk.xml`  XML registry file, add the
+       `-DVULKAN_HPP_RUN_GENERATOR=ON` option to the CMake command line.
+5. Either open the generated project with an IDE, e.g. Visual Studio or launch the build process with ```cmake --build .```.
 
-optional) To update the Vulkan-Hpp and its submodules execute ```git pull --recurse-submodules```.
+Optional: To update the Vulkan-Hpp and its submodules execute ```git pull --recurse-submodules```.
 
 ### Optional Features