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).

wpiutil/src/main/native/include/wpi/uv/Tty.h

@@ -59,7 +59,9 @@ class Tty final : public StreamImpl<Tty, uv_tty_t> {
    */
   void SetMode(uv_tty_mode_t mode) {
     int err = uv_tty_set_mode(GetRaw(), mode);
-    if (err < 0) ReportError(err);
+    if (err < 0) {
+      ReportError(err);
+    }
   }
 
   /**