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).

wpilibc/src/test/native/cpp/MockSpeedController.cpp

@@ -10,16 +10,26 @@ void MockSpeedController::Set(double speed) {
   m_speed = m_isInverted ? -speed : speed;
 }
 
-double MockSpeedController::Get() const { return m_speed; }
+double MockSpeedController::Get() const {
+  return m_speed;
+}
 
 void MockSpeedController::SetInverted(bool isInverted) {
   m_isInverted = isInverted;
 }
 
-bool MockSpeedController::GetInverted() const { return m_isInverted; }
+bool MockSpeedController::GetInverted() const {
+  return m_isInverted;
+}
 
-void MockSpeedController::Disable() { m_speed = 0; }
+void MockSpeedController::Disable() {
+  m_speed = 0;
+}
 
-void MockSpeedController::StopMotor() { Disable(); }
+void MockSpeedController::StopMotor() {
+  Disable();
+}
 
-void MockSpeedController::PIDWrite(double output) { Set(output); }
+void MockSpeedController::PIDWrite(double output) {
+  Set(output);
+}

wpilibc/src/test/native/cpp/simulation/SimDeviceSimTest.cpp

@@ -27,7 +27,9 @@ TEST(SimDeviceSimTests, TestEnumerateDevices) {
   bool foundit = false;
   SimDeviceSim::EnumerateDevices(
       "te", [&](const char* name, HAL_SimDeviceHandle handle) {
-        if (wpi::StringRef(name) == "test") foundit = true;
+        if (wpi::StringRef(name) == "test") {
+          foundit = true;
+        }
       });
   EXPECT_TRUE(foundit);
 }