doc: 'Standard ML' is definitely too ambiguous

doc/library.tex

@@ -12,7 +12,7 @@ documentation automatically generated from the actual sources,
 available at \url{http://why3.lri.fr/stdlib/}.
 
 
-\section{Standard Theories}
+\section{Theories}
 \label{sec:stdlib}
 
 We present the most important theories here, see the URL above for the
@@ -146,7 +146,7 @@ This library provides the classical ML type of polymorphic lists, with
 constructors \verb|Nil| and \verb|Cons|. Most of the classical list
 operators are provided in separate theories.
 
-\section{Standard ML Modules}
+\section{Modules}
 \label{sec:mllibrary}
 
 The standard ML modules provided allow to write imperative