Add braces to C++ single-line loops and conditionals (NFC) (#2973)

This makes code easier to read and more consistent between C++ and Java.
Also update clang-format settings to always add a line break (even if no braces are used).

wpilibNewCommands/src/main/native/cpp/frc2/command/MecanumControllerCommand.cpp

@@ -335,7 +335,9 @@ void MecanumControllerCommand::Execute() {
   }
 }
 
-void MecanumControllerCommand::End(bool interrupted) { m_timer.Stop(); }
+void MecanumControllerCommand::End(bool interrupted) {
+  m_timer.Stop();
+}
 
 bool MecanumControllerCommand::IsFinished() {
   return m_timer.HasElapsed(m_trajectory.TotalTime());