Update Doc/library/decimal.rst

Co-authored-by: RUANG (James Roy) <longjinyii@outlook.com>

Author: skirpichev

Doc/library/decimal.rst

@@ -34,8 +34,8 @@ The :mod:`decimal` module provides support for fast correctly rounded
 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
+* Decimal "is based on a [floating-point model]
+  (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