Fix typos.

libsolidity/analysis/ViewPureChecker.cpp

@@ -292,11 +292,11 @@ void ViewPureChecker::endVisit(FunctionCall const& _functionCall)
 	if (_functionCall.annotation().kind != FunctionCallKind::FunctionCall)
 		return;
 
-	StateMutability mut = dynamic_cast<FunctionType const&>(*_functionCall.expression().annotation().type).stateMutability();
+	StateMutability mutability = dynamic_cast<FunctionType const&>(*_functionCall.expression().annotation().type).stateMutability();
 	// We only require "nonpayable" to call a payble function.
-	if (mut == StateMutability::Payable)
-		mut = StateMutability::NonPayable;
-	reportMutability(mut, _functionCall.location());
+	if (mutability == StateMutability::Payable)
+		mutability = StateMutability::NonPayable;
+	reportMutability(mutability, _functionCall.location());
 }
 
 bool ViewPureChecker::visit(MemberAccess const& _memberAccess)

libsolidity/codegen/CompilerUtils.h

@@ -260,7 +260,7 @@ public:
 	/// Stack post: <shifted_value>
 	void rightShiftNumberOnStack(unsigned _bits);
 
-	/// Appends code that computes tha Keccak-256 hash of the topmost stack element of 32 byte type.
+	/// Appends code that computes the Keccak-256 hash of the topmost stack element of 32 byte type.
 	void computeHashStatic();
 
 	/// Bytes we need to the start of call data.

libsolidity/parsing/Scanner.cpp

@@ -601,7 +601,7 @@ void Scanner::scanToken()
 			{
 				tie(token, m, n) = scanIdentifierOrKeyword();
 
-				// Special case for hexademical literals
+				// Special case for hexadecimal literals
 				if (token == Token::Hex)
 				{
 					// reset