diff --git a/samples/fitch/languages/jetbrains.mps.fitch/jetbrains.mps.fitch.mpl b/samples/fitch/languages/jetbrains.mps.fitch/jetbrains.mps.fitch.mpl
index 53dd03e8..49daca81 100644
--- a/samples/fitch/languages/jetbrains.mps.fitch/jetbrains.mps.fitch.mpl
+++ b/samples/fitch/languages/jetbrains.mps.fitch/jetbrains.mps.fitch.mpl
@@ -89,6 +89,7 @@
+
@@ -97,6 +98,7 @@
+
diff --git a/samples/fitch/languages/jetbrains.mps.logic.firstOrder/jetbrains.mps.logic.firstOrder.mpl b/samples/fitch/languages/jetbrains.mps.logic.firstOrder/jetbrains.mps.logic.firstOrder.mpl
index 5ff411cd..01ff2ba0 100644
--- a/samples/fitch/languages/jetbrains.mps.logic.firstOrder/jetbrains.mps.logic.firstOrder.mpl
+++ b/samples/fitch/languages/jetbrains.mps.logic.firstOrder/jetbrains.mps.logic.firstOrder.mpl
@@ -88,6 +88,7 @@
+
diff --git a/samples/fitch/languages/jetbrains.mps.logic.herbrand/jetbrains.mps.logic.herbrand.mpl b/samples/fitch/languages/jetbrains.mps.logic.herbrand/jetbrains.mps.logic.herbrand.mpl
index a182c421..a0a466a9 100644
--- a/samples/fitch/languages/jetbrains.mps.logic.herbrand/jetbrains.mps.logic.herbrand.mpl
+++ b/samples/fitch/languages/jetbrains.mps.logic.herbrand/jetbrains.mps.logic.herbrand.mpl
@@ -89,6 +89,7 @@
+
diff --git a/samples/fitch/languages/jetbrains.mps.logic.propositional/jetbrains.mps.logic.propositional.mpl b/samples/fitch/languages/jetbrains.mps.logic.propositional/jetbrains.mps.logic.propositional.mpl
index 2b8acfe1..d816f99b 100644
--- a/samples/fitch/languages/jetbrains.mps.logic.propositional/jetbrains.mps.logic.propositional.mpl
+++ b/samples/fitch/languages/jetbrains.mps.logic.propositional/jetbrains.mps.logic.propositional.mpl
@@ -86,6 +86,7 @@
+