Improve syntax error reporting

src/wassembler.cpp

@@ -5,9 +5,11 @@
 
 void PrintBadToken(Token::Token const & token, std::vector<std::string> const & lines)
 {
-	std::printf("at line number %i, column %i:\n",
+	std::printf("at line number %i, column %i: ",
 		token.lineNumber + 1,
 		token.lineColumn + 1);
+	std::puts(token.errorMessage.c_str());
+
 	std::printf("%s\n", lines[token.lineNumber].c_str());
 	for(int i = 0; i < token.lineColumn; ++i)
 	{
@@ -109,6 +111,7 @@ bool Wassembler::LoadFromFile(std::string const & filePath)
 	catch(Interpret::InterpretationError & e)
 	{
 		PrintBadToken(e.errorToken, lines);
+		std::puts("Aborting due to semantic error(s)");
 		return false;
 	}