Trim ToString() for units without abbreviation

Scalar, Ratio and other quantities with units that don't have an abbreviation,
would result in a trailing whitespace.

Example: Scalar.FromAmount(1).ToString() == "1 "

Author: angularsen

UnitsNet/QuantityFormatter.cs

@@ -124,6 +124,12 @@ public static string Format<TUnitType>(IQuantity<TUnitType> quantity, string for
         /// <returns>The string representation.</returns>
         public static string Format<TUnitType>(IQuantity<TUnitType> quantity, string format, IFormatProvider? formatProvider)
             where TUnitType : Enum
+        {
+            return FormatUntrimmed(quantity, format, formatProvider).Trim();
+        }
+
+        private static string FormatUntrimmed<TUnitType>(IQuantity<TUnitType> quantity, string format, IFormatProvider? formatProvider)
+            where TUnitType : Enum
         {
             formatProvider ??= CultureInfo.CurrentUICulture;