Please improve wording of explanation of a Gfortran extension

[Cyril Magnin]

On the page
https://gcc.gnu.org/onlinedocs/gfortran/Unary-operators.html#Unary-operators,
we find the following statement:

6.1.11 Unary operators
>
> As an extension, GNU Fortran allows unary plus and unary minus operators
> to appear as the second operand of binary arithmetic operators without the
> need for parenthesis.
>
>        X = Y * -Z
>
>
> The meaning is quite clear, but the wording can be improved. An "operator
appears as the second operand" ? Perhaps this could say, "...unary plus or
minus operators to be applied to the second operand of.." or "unary plus or
minus operators to be prefixed to the second operand of ...".

Thanks.