restrict setCoord to reasonable accuracy

pub/plot/ps_plotter.cpp

@@ -188,7 +188,7 @@ namespace {
 
     string ps_coord(const CAxis* A, const char a)
     {
-        return str(format("%1i %13.7g %13.7g %cSetCoord\n") % A->logflag % A->inf % A->sup % a);
+        return str(format("%1i %12.4g %12.4g %cSetCoord\n") % A->logflag % A->inf % A->sup % a);
     }
 
     string ps_axis(const CAxis* A, const string& label, const char a)