Consistency: "{\bf ...}" ==> "\strong{...}"
"{\em ...}" ==> "\emph{...}"
Not at all sure what to do with "{\rm ...}".
Leaving it for now.
diff --git a/Doc/lib/libmpz.tex b/Doc/lib/libmpz.tex
index 9fb165b..2771d92 100644
--- a/Doc/lib/libmpz.tex
+++ b/Doc/lib/libmpz.tex
@@ -33,7 +33,7 @@
method, described below.
\end{funcdesc}
-A number of {\em extra} functions are defined in this module. Non
+A number of \emph{extra} functions are defined in this module. Non
mpz-arguments are converted to mpz-values first, and the functions
return mpz-numbers.