diff --git a/homework/src/sample_project/src/main/antlr/Hello.g4 b/homework/src/sample_project/src/main/antlr/Hello.g4
index 8456c6e6d..8c3803dca 100644
--- a/homework/src/sample_project/src/main/antlr/Hello.g4
+++ b/homework/src/sample_project/src/main/antlr/Hello.g4
@@ -16,4 +16,5 @@ atom  : ID | NUM ;
 // Lexer
 ID    : [a-z][a-zA-Z]* ;
 NUM   : [0-9]+ ;
+
 WS    : [ \t\n]+ -> skip ;
diff --git a/homework/src/sample_project/src/main/antlr/MiniC.g4 b/homework/src/sample_project/src/main/antlr/MiniC.g4
index dabf3d872..110563a72 100644
--- a/homework/src/sample_project/src/main/antlr/MiniC.g4
+++ b/homework/src/sample_project/src/main/antlr/MiniC.g4
@@ -51,5 +51,6 @@ type    :  'int' | 'string' | 'bool' ;
 ID      :  [a-z][a-zA-Z0-9]* ;
 NUMBER  :  [0-9]+ ;
 STRING  :  '"' (~[\n\r"])* '"' ;
+
 COMMENT :  '#' ~[\n\r]* -> skip ;
 WS      :  [ \t\n\r]+ -> skip ;
diff --git a/homework/src/sample_project/src/main/antlr/my/pkg/HelloPackage.g4 b/homework/src/sample_project/src/main/antlr/my/pkg/HelloPackage.g4
index a641f55c6..6b3c4f2f3 100644
--- a/homework/src/sample_project/src/main/antlr/my/pkg/HelloPackage.g4
+++ b/homework/src/sample_project/src/main/antlr/my/pkg/HelloPackage.g4
@@ -20,4 +20,5 @@ atom  : ID | NUM ;
 // Lexer
 ID    : [a-z][a-zA-Z]* ;
 NUM   : [0-9]+ ;
+
 WS    : [ \t\n]+ -> skip ;