Add fallback argument to translation(). Request fallbacks on install.
Fixes #500595.
diff --git a/Doc/lib/libgettext.tex b/Doc/lib/libgettext.tex
index aaacd80..be22340 100644
--- a/Doc/lib/libgettext.tex
+++ b/Doc/lib/libgettext.tex
@@ -123,7 +123,8 @@
\end{funcdesc}
\begin{funcdesc}{translation}{domain\optional{, localedir\optional{,
- languages\optional{, class_}}}}
+ languages\optional{,
+ class_,\optional{fallback}}}}}
Return a \class{Translations} instance based on the \var{domain},
\var{localedir}, and \var{languages}, which are first passed to
\function{find()} to get the
@@ -132,7 +133,9 @@
is either \var{class_} if provided, otherwise
\class{GNUTranslations}. The class's constructor must take a single
file object argument. If no \file{.mo} file is found, this
-function raises \exception{IOError}.
+function raises \exception{IOError} if \var{fallback} is false
+(which is the default), and returns a \class{NullTranslations} instance
+if \var{fallback} is true.
\end{funcdesc}
\begin{funcdesc}{install}{domain\optional{, localedir\optional{, unicode}}}