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/commands/command2/ReplaceMeCommand2.cpp

@@ -18,4 +18,6 @@ void ReplaceMeCommand2::Execute() {}
 void ReplaceMeCommand2::End(bool interrupted) {}
 
 // Returns true when the command should end.
-bool ReplaceMeCommand2::IsFinished() { return false; }
+bool ReplaceMeCommand2::IsFinished() {
+  return false;
+}