-The @code{subs()} method has an extra, optional, argument. This argument can
-be used to pass one of the @code{subs_options} to it. The only option that is
-currently available is the @code{subs_algebraic} option which affects
-products and powers. If you want to substitute some factors of a product, you
-only need to list these factors in your pattern. Furthermore, if an (integer)
-power of some expression occurs in your pattern and in the expression that you
-want the substitution to occur in, it can be substituted as many times as
-possible, without getting negative powers.
+Supplying the @code{subs_options::subs_algebraic} option to @code{subs()}
+enables smarter, algebraic substitutions in products and powers. If you want
+to substitute some factors of a product, you only need to list these factors
+in your pattern. Furthermore, if an (integer) power of some expression occurs
+in your pattern and in the expression that you want the substitution to occur
+in, it can be substituted as many times as possible, without getting negative
+powers.