Prefer anonymous links

Author: hugovk

Doc/library/decimal.rst

@@ -35,7 +35,7 @@ decimal floating-point arithmetic. It offers several advantages over the
 :class:`float` datatype:
 
 * Decimal "is based on a `floating-point model
-  <https://speleotrove.com/decimal/damodel.html#refnumber>`_ which was designed
+  <https://speleotrove.com/decimal/damodel.html#refnumber>`__ which was designed
   with people in mind, and necessarily has a paramount guiding principle --
   computers must provide an arithmetic that works in the same way as the
   arithmetic that people learn at school." -- excerpt from the decimal