Merge remote-tracking branch 'XRPLF/ximinez/number-round-maxrep-down' into ximinez/number-round-maxrep

* XRPLF/ximinez/number-round-maxrep-down:
  Fix formatting, add an assert

src/libxrpl/basics/Number.cpp

@@ -528,6 +528,9 @@ Number::Guard::doRoundDown(bool& negative, T& mantissa, int& exponent)
     {
         // If there was any remainder, subtract 1 from the result. This is sufficient to get the
         // best rounding.
+        XRPL_ASSERT(
+            empty() || mantissa > maxMantissa_,
+            "xrpl::Number::Guard::doRoundDown : mantissa is expected size");
         if (r != Round::Exact)
         {
             --mantissa;