Fix a few pieces of documentation

client/registration_protocol_win.h

Index: client/registration_protocol_win.h
diff --git a/client/registration_protocol_win.h b/client/registration_protocol_win.h
index 75a58051eb68b1dc4488b1858fc450745149392b..68eaa76c3c51adda1c7a3d2f52169b8b78a2a5da 100644
--- a/client/registration_protocol_win.h
+++ b/client/registration_protocol_win.h
@@ -34,10 +34,12 @@ struct RegistrationRequest {
 #pragma pack(pop)
 
 #pragma pack(push, 1)
-//! \brief  A client registration response. See
-//!     https://msdn.microsoft.com/en-us/library/windows/desktop/aa384203 for
-//!     details on communicating handle values between 32-bit and 64-bit
-//!     processes.
+//! \brief  A client registration response.
+//!
+//! See <a
+//! href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa384203">Interprocess
+//! Communication Between 32-bit and 64-bit Applications</a> for details on
+//! communicating handle values between processes of varying bitness.
 struct RegistrationResponse {
   //! \brief An event `HANDLE`, valid in the client process, that should be
   //!     signaled to request a crash report. 64-bit clients should convert the