Update docs to be consistent with prevalent style (#2491)

Author: mikomikotaishi

docs/Handles.md

@@ -83,21 +83,22 @@ Add a `friend` declaration for the base class.
 // Example of a custom shared device, that accepts an instance as a parent
 class MySharedHandle<VkDevice> : public vk::SharedHandleBase<VkDevice, vk::SharedInstance, MySharedHandle<VkDevice>>
 {
-  using base = vk::SharedHandleBase<VkDevice, vk::SharedInstance, MySharedHandle<VkDevice>>;
-  friend base;
+  using Base = vk::SharedHandleBase<VkDevice, vk::SharedInstance, MySharedHandle<VkDevice>>;
+  friend Base;
 
 public:
   MySharedHandle() = default;
-  explicit MySharedHandle(VkDevice handle, vk::SharedInstance parent) noexcept
-    : base(handle, std::move(parent)) {}
+  explicit MySharedHandle(VkDevice handle, vk::SharedInstance parent) noexcept:
+    Base(handle, std::move(parent)) {}
 
-  const auto& getParent() const noexcept
+  [[nodiscard]]
+  const vk::SharedInstance& getParent() const noexcept
   {
     return getHeader();
   }
 
 protected:
-  static void internalDestroy(const vk::SharedInstance& /*control*/, VkDevice handle) noexcept
+  static void internalDestroy([[maybe_unused]] const vk::SharedInstance& control, VkDevice handle) noexcept
   {
     vkDestroyDevice(handle);
   }

docs/Usage.md

@@ -905,14 +905,15 @@ This may be combined with the following basic `main.cpp` consumer code:
 // optional include for VULKAN_HPP_DEFAULT_DISPATCHER
 // otherwise, use vk::detail::defaultDispatchLoaderDynamic
 #include <vulkan/vulkan_hpp_macros.hpp>
+
 import vulkan;
 
-auto main(int argc, char* const argv[]) -> int
+int main(int argc, char* argv[])
 {
     // initialize minimal set of function pointers
     VULKAN_HPP_DEFAULT_DISPATCHER.init();
 
-    auto appInfo = vk::ApplicationInfo("My App", 1, "My Engine", 1, vk::makeApiVersion(1, 0, 0, 0));
+    vk::ApplicationInfo appInfo("My App", 1, "My Engine", 1, vk::makeApiVersion(1, 0, 0, 0));
 
     vk::Instance instance;
     // create vk::Instance instance here