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).

wpilibOldCommands/src/main/native/cpp/commands/PrintCommand.cpp

@@ -13,4 +13,6 @@ PrintCommand::PrintCommand(const wpi::Twine& message)
   m_message = message.str();
 }
 
-void PrintCommand::Initialize() { wpi::outs() << m_message << '\n'; }
+void PrintCommand::Initialize() {
+  wpi::outs() << m_message << '\n';
+}