Make references to whrandom hyperlinks.

Doc/lib/librandom.tex

 \section{\module{random} ---
-         Generate pseudo-random numbers with various distributions.}
-\declaremodule{standard}{random}
+         Generate pseudo-random numbers}
 
+\declaremodule{standard}{random}
 \modulesynopsis{Generate pseudo-random numbers with various common
-distributions.}
+                distributions.}
 
 
 This module implements pseudo-random number generators for various
@@ -13,10 +13,10 @@ distributions.  For generating distribution of angles, the circular
 uniform and von Mises distributions are available.
 
 The module exports the following functions, which are exactly
-equivalent to those in the \module{whrandom} module:
+equivalent to those in the \refmodule{whrandom} module:
 \function{choice()}, \function{randint()}, \function{random()} and
-\function{uniform()}.  See the documentation for the \module{whrandom}
-module for these functions.
+\function{uniform()}.  See the documentation for the
+\refmodule{whrandom} module for these functions.
 
 The following functions specific to the \module{random} module are also
 defined, and all return real values.  Function parameters are named
@@ -34,7 +34,7 @@ Returned values will range between 0 and 1.
 Circular uniform distribution.  \var{mean} is the mean angle, and
 \var{arc} is the range of the distribution, centered around the mean
 angle.  Both values must be expressed in radians, and can range
-between 0 and pi.  Returned values will range between
+between 0 and \emph{pi}.  Returned values will range between
 \code{\var{mean} - \var{arc}/2} and \code{\var{mean} + \var{arc}/2}.
 \end{funcdesc}
 
@@ -69,11 +69,11 @@ standard deviation.
 \end{funcdesc}
 
 \begin{funcdesc}{vonmisesvariate}{mu, kappa}
-\var{mu} is the mean angle, expressed in radians between 0 and 2*pi,
+\var{mu} is the mean angle, expressed in radians between 0 and 2*\emph{pi},
 and \var{kappa} is the concentration parameter, which must be greater
 than or equal to zero.  If \var{kappa} is equal to zero, this
 distribution reduces to a uniform random angle over the range 0 to
-2*pi.
+2*\emph{pi}.
 \end{funcdesc}
 
 \begin{funcdesc}{paretovariate}{alpha}
@@ -86,5 +86,5 @@ Weibull distribution.  \var{alpha} is the scale parameter and
 \end{funcdesc}
 
 \begin{seealso}
-\seemodule{whrandom}{the standard Python random number generator}
+  \seemodule{whrandom}{the standard Python random number generator}
 \end{seealso}