diff --git a/lab3-4/ast.cc b/lab3-4/ast.cc
index d156936eb9088e241e58cb63331dce15d9ecb6cf..d62488c940bbec8a886c99bfed45340dc2ea77cf 100644
--- a/lab3-4/ast.cc
+++ b/lab3-4/ast.cc
@@ -241,7 +241,7 @@ void BinaryOperation::xprint(ostream& o, const char *cls)
     endChild(o);
 }
 
-void Plus::print(ostream& o) { xprint(o, "Plus"); } // 
+void Plus::print(ostream& o) { xprint(o, "Plus"); } //
 void Minus::print(ostream& o) { xprint(o, "Minus"); }
 void Times::print(ostream& o) { xprint(o, "Times"); }
 void Divide::print(ostream& o) {xprint(o, "Divide"); }
@@ -328,7 +328,7 @@ void BinaryCondition::xprint(ostream& o, const char *cls)
 }
 
 void And::print(ostream& o) { xprint(o, "And"); }
-void Or::print(ostream& o) { xprint(o, "Or"); } // 
+void Or::print(ostream& o) { xprint(o, "Or"); } //
 
 void Not::print(ostream& o)
 {