Mark the references to module names use \module or \refmodule (the

closing paragraph used \code).

Doc/lib/libcmath.tex

 \section{\module{cmath} ---
-         Mathematical functions for complex numbers.}
-\declaremodule{builtin}{cmath}
-
+         Mathematical functions for complex numbers}
 
+\declaremodule{builtin}{cmath}
 \modulesynopsis{Mathematical functions for complex numbers.}
 
-This module is always available.
-It provides access to mathematical functions for complex numbers.
-The functions are:
+This module is always available.  It provides access to mathematical
+functions for complex numbers.  The functions are:
 
 \begin{funcdesc}{acos}{x}
 Return the arc cosine of \var{x}.
@@ -84,10 +82,10 @@ The mathematical constant \emph{e}, as a real.
 \end{datadesc}
 
 Note that the selection of functions is similar, but not identical, to
-that in module \code{math}\refbimodindex{math}.  The reason for having
+that in module \refmodule{math}\refbimodindex{math}.  The reason for having
 two modules is, that some users aren't interested in complex numbers,
 and perhaps don't even know what they are.  They would rather have
 \code{math.sqrt(-1)} raise an exception than return a complex number.
-Also note that the functions defined in \code{cmath} always return a
+Also note that the functions defined in \module{cmath} always return a
 complex number, even if the answer can be expressed as a real number
 (in which case the complex number has an imaginary part of zero).