fix RemoveEpsilon rules for LeftLG and RightLG

alib2algo/src/grammar/simplify/EpsilonRemover.cpp

@@ -77,9 +77,9 @@ grammar::EpsilonFreeCFG EpsilonRemover::remove(const grammar::LG& origGrammar)
 	return removeInternal(origGrammar);
 }
-grammar::LeftLG EpsilonRemover::remove(const grammar::LeftLG& origGrammar)
+grammar::EpsilonFreeCFG EpsilonRemover::remove(const grammar::LeftLG& origGrammar)
 {
-	return origGrammar;
+	return removeInternal(origGrammar);
 }
 grammar::LeftRG EpsilonRemover::remove(const grammar::LeftRG& origGrammar)
@@ -87,9 +87,9 @@ grammar::LeftRG EpsilonRemover::remove(const grammar::LeftRG& origGrammar)
 	return origGrammar;
 }
-grammar::RightLG EpsilonRemover::remove(const grammar::RightLG& origGrammar)
+grammar::EpsilonFreeCFG EpsilonRemover::remove(const grammar::RightLG& origGrammar)
 {
-	return origGrammar;
+	return removeInternal(origGrammar);
 }
 grammar::RightRG EpsilonRemover::remove(const grammar::RightRG& origGrammar)

alib2algo/src/grammar/simplify/EpsilonRemover.h

@@ -37,9 +37,9 @@ public:
 	static grammar::GNF remove( const grammar::GNF & grammar );
 	static grammar::CNF remove( const grammar::CNF & grammar );
 	static grammar::EpsilonFreeCFG remove( const grammar::LG & grammar );
-	static grammar::LeftLG remove( const grammar::LeftLG & grammar );
+	static grammar::EpsilonFreeCFG remove( const grammar::LeftLG & grammar );
 	static grammar::LeftRG remove( const grammar::LeftRG & grammar );
-	static grammar::RightLG remove( const grammar::RightLG & grammar );
+	static grammar::EpsilonFreeCFG remove( const grammar::RightLG & grammar );
 	static grammar::RightRG remove( const grammar::RightRG & grammar );
 private: