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).

wpilibcExamples/src/main/cpp/examples/StateSpaceDifferentialDriveSimulation/cpp/Robot.cpp

@@ -19,7 +19,9 @@ void Robot::RobotInit() {}
  * <p> This runs after the mode specific periodic functions, but before
  * LiveWindow and SmartDashboard integrated updating.
  */
-void Robot::RobotPeriodic() { frc2::CommandScheduler::GetInstance().Run(); }
+void Robot::RobotPeriodic() {
+  frc2::CommandScheduler::GetInstance().Run();
+}
 
 /**
  * This function is called once each time the robot enters Disabled mode. You
@@ -79,5 +81,7 @@ void Robot::SimulationPeriodic() {
 }
 
 #ifndef RUNNING_FRC_TESTS
-int main() { return frc::StartRobot<Robot>(); }
+int main() {
+  return frc::StartRobot<Robot>();
+}
 #endif

wpilibcExamples/src/main/cpp/examples/StateSpaceDifferentialDriveSimulation/cpp/RobotContainer.cpp

@@ -35,9 +35,13 @@ RobotContainer::RobotContainer() {
       {&m_drive}));
 }
 
-void RobotContainer::ZeroAllOutputs() { m_drive.TankDriveVolts(0_V, 0_V); }
+void RobotContainer::ZeroAllOutputs() {
+  m_drive.TankDriveVolts(0_V, 0_V);
+}
 
-const DriveSubsystem& RobotContainer::GetRobotDrive() const { return m_drive; }
+const DriveSubsystem& RobotContainer::GetRobotDrive() const {
+  return m_drive;
+}
 
 void RobotContainer::ConfigureButtonBindings() {
   // Configure your button bindings here

wpilibcExamples/src/main/cpp/examples/StateSpaceDifferentialDriveSimulation/cpp/subsystems/DriveSubsystem.cpp

@@ -75,9 +75,13 @@ double DriveSubsystem::GetAverageEncoderDistance() {
   return (m_leftEncoder.GetDistance() + m_rightEncoder.GetDistance()) / 2.0;
 }
 
-frc::Encoder& DriveSubsystem::GetLeftEncoder() { return m_leftEncoder; }
+frc::Encoder& DriveSubsystem::GetLeftEncoder() {
+  return m_leftEncoder;
+}
 
-frc::Encoder& DriveSubsystem::GetRightEncoder() { return m_rightEncoder; }
+frc::Encoder& DriveSubsystem::GetRightEncoder() {
+  return m_rightEncoder;
+}
 
 void DriveSubsystem::SetMaxOutput(double maxOutput) {
   m_drive.SetMaxOutput(maxOutput);
@@ -87,9 +91,13 @@ units::degree_t DriveSubsystem::GetHeading() const {
   return m_gyro.GetRotation2d().Degrees();
 }
 
-double DriveSubsystem::GetTurnRate() { return -m_gyro.GetRate(); }
+double DriveSubsystem::GetTurnRate() {
+  return -m_gyro.GetRate();
+}
 
-frc::Pose2d DriveSubsystem::GetPose() { return m_odometry.GetPose(); }
+frc::Pose2d DriveSubsystem::GetPose() {
+  return m_odometry.GetPose();
+}
 
 frc::DifferentialDriveWheelSpeeds DriveSubsystem::GetWheelSpeeds() {
   return {units::meters_per_second_t(m_leftEncoder.GetRate()),