REPLines: Add REP lines into model, view and minor change.

src/Solver/Mage.py

@@ -128,6 +128,15 @@ class Mage(CommandLineSolver):
         name = self._study.name
         return f"{name}.TRA"
 
+    def _export_REP_additional_lines(self, study, rep_file):
+        lines = filter(
+            lambda line: line.is_enabled(),
+            study.river.rep_lines.lines
+        )
+
+        for line in lines:
+            rep_file.write(line.line)
+
     @timer
     def _export_ST(self, study, repertory, qlog, name="0"):
         files = []
@@ -661,6 +670,8 @@ class Mage(CommandLineSolver):
                 if EXT in ["GRA"]:
                     f.write(f"{EXT} {file}\n")
 
+            self._export_REP_additional_lines(study, f)
+
     @timer
     def export(self, study, repertory, qlog=None):
         self._study = study