Small review fixes.

libevmcore/ExpressionClasses.cpp

@@ -35,7 +35,7 @@ using namespace dev;
 using namespace dev::eth;
 
 
-bool ExpressionClasses::Expression::operator<(const ExpressionClasses::Expression& _other) const
+bool ExpressionClasses::Expression::operator<(ExpressionClasses::Expression const& _other) const
 {
 	auto type = item->type();
 	auto otherType = _other.item->type();
@@ -74,7 +74,7 @@ ExpressionClasses::Id ExpressionClasses::find(AssemblyItem const& _item, Ids con
 	return exp.id;
 }
 
-string ExpressionClasses::fullDAGToString(ExpressionClasses::Id _id)
+string ExpressionClasses::fullDAGToString(ExpressionClasses::Id _id) const
 {
 	Expression const& expr = representative(_id);
 	stringstream str;

libevmcore/ExpressionClasses.h

@@ -63,7 +63,7 @@ public:
 	/// @returns the number of classes.
 	Id size() const { return m_representatives.size(); }
 
-	std::string fullDAGToString(Id _id);
+	std::string fullDAGToString(Id _id) const;
 
 private:
 	/// Tries to simplify the given expression.

libevmcore/Instruction.h

@@ -237,7 +237,7 @@ enum Tier
 struct InstructionInfo
 {
 	std::string name;	///< The name of the instruction.
-	int additional;		//a/< Additional items required in memory for this instructions (only for PUSH).
+	int additional;		///< Additional items required in memory for this instructions (only for PUSH).
 	int args;			///< Number of items required on the stack for this instruction (and, for the purposes of ret, the number taken from the stack).
 	int ret;			///< Number of items placed (back) on the stack by this instruction, assuming args items were removed.
 	bool sideEffects;	///< false if the only effect on the execution environment (apart from gas usage) is a change to a topmost segment of the stack