random: clarify the intervals for 'uniform' calls

random.hpp

@@ -63,7 +63,8 @@ namespace cruft::random {
     /// Returns a value chosen uniformly at random the supplied range.
     ///
     /// This is primarily a convenience helper around the uniform_distribution
-    /// type.
+    /// type. As such, the interval is the same as the std library; ie, closed
+    /// for integers, half-open for reals.
     template <typename ValueT, typename GeneratorT>
     decltype(auto)
     uniform (ValueT lo, ValueT hi, GeneratorT &&gen)