write Latex model: added automatic line breaks with breqn Latex package

doc/dynare.texi

@@ -1602,6 +1602,7 @@ static model can also be written with the
 @code{write_latex_static_model} command.
 
 @anchor{write_latex_dynamic_model}
+
 @deffn Command write_latex_dynamic_model ;
 
 @descriptionhead
@@ -1644,6 +1645,9 @@ for a stochastic model, exogenous variables with leads or lags will
 also have been replaced by new auxiliary variables and equations.
 @end itemize
 
+Compiling the TeX file requires the following Latex packages: 
+@code{geometry}, @code{fullpage}, @code{breqn}.
+
 @end deffn
 
 @deffn Command write_latex_static_model ;
@@ -1669,6 +1673,9 @@ optional @code{steady_state_model} block (@pxref{steady_state_model});
 it will rather output a static version (@i{i.e.} without leads and
 lags) of the dynamic model declared in the @code{model} block.
 
+Compiling the TeX file requires the following Latex packages: 
+@code{geometry}, @code{fullpage}, @code{breqn}.
+
 @end deffn
 
 @node Auxiliary variables
@@ -4364,6 +4371,10 @@ interval. Default: @code{0.90}
 Don't display graphics.
 @end table
 
+@customhead{Initial Values}
+
+@code{forecast} computes the forecast taking as initial values the values specified in @code{histval} (@pxref{Initial and terminal conditions,histval}). When no @code{histval} block is present, the initial values are the one stated in @code{initval}. When @code{initval} is followed by command @code{steady}, the initial values are the steady state (@pxref{Steady state,steady}).
+
 @outputhead
 
 The results are stored in @code{oo_.forecast}, which is described below.

preprocessor/ModelTree.cc

@@ -1327,6 +1327,7 @@ ModelTree::writeLatexModelFile(const string &filename, ExprNodeOutputType output
   output << "\\documentclass[10pt,a4paper]{article}" << endl
          << "\\usepackage[landscape]{geometry}" << endl
          << "\\usepackage{fullpage}" << endl
+         << "\\usepackage{breqn}" << endl
          << "\\begin{document}" << endl
          << "\\footnotesize" << endl;
 
@@ -1337,20 +1338,20 @@ ModelTree::writeLatexModelFile(const string &filename, ExprNodeOutputType output
       int id = it->first;
       expr_t value = it->second;
 
-      output << "\\begin{equation*}" << endl
+      output << "\\begin{dmath*}" << endl
              << symbol_table.getName(id) << " = ";
       // Use an empty set for the temporary terms
       value->writeOutput(output, output_type);
-      output << endl << "\\end{equation*}" << endl;
+      output << endl << "\\end{dmath*}" << endl;
     }
 
   for (int eq = 0; eq < (int) equations.size(); eq++)
     {
-      output << "\\begin{equation}" << endl
+      output << "\\begin{dmath}" << endl
              << "% Equation " << eq+1 << endl;
       // Here it is necessary to cast to superclass ExprNode, otherwise the overloaded writeOutput() method is not found
       dynamic_cast<ExprNode *>(equations[eq])->writeOutput(output, output_type);
-      output << endl << "\\end{equation}" << endl;
+      output << endl << "\\end{dmath}" << endl;
     }
 
   output << "\\end{document}" << endl;