Fix broken markup, & tweak a couple of things for consistency.

Doc/lib/libthreading.tex

@@ -91,16 +91,16 @@ A thread that executes a function after a specified interval has passed.
 \end{classdesc*}
 
 \begin{funcdesc}{settrace}{func}
-Set a trace function \index{trace function} for all threads started
+Set a trace function\index{trace function} for all threads started
 from the \module{threading} module.  The \var{func} will be passed to 
-\cfuntion{sys.settrace} for each thread, before its \method{run}
+\function{sys.settrace()} for each thread, before its \method{run()}
 method is called.
 \end{funcdesc}
 
 \begin{funcdesc}{setprofile}{func}
-Set a profile function \index{profile function} for all threads started
+Set a profile function\index{profile function} for all threads started
 from the \module{threading} module.  The \var{func} will be passed to 
-\cfuntion{sys.setprofile} for each thread, before its \method{run}
+\function{sys.setprofile()} for each thread, before its \method{run()}
 method is called.
 \end{funcdesc}