Fix initial values for HTML Tokens and handle nil-parameter

HTMLKit/HTMLCharacterToken.m

@@ -20,13 +20,16 @@
 {
 	self = [super init];
 	if (self) {
-		_characters = [[NSMutableString alloc] initWithString:string];
+		_characters = [string mutableCopy];
 	}
 	return self;
 }
 
 - (void)appendString:(NSString *)string
 {
+	if (_characters == nil) {
+		_characters = [NSMutableString new];
+	}
 	[_characters appendString:string];
 }
 

HTMLKit/HTMLCommentToken.m

@@ -22,13 +22,16 @@
 	self = [super init];
 	if (self) {
 		self.type = HTMLTokenTypeComment;
-		_data = [[NSMutableString alloc] initWithString:data];
+		_data = [data mutableCopy];
 	}
 	return self;
 }
 
 - (void)appendStringToData:(NSString *)string
 {
+	if (_data == nil) {
+		_data = [NSMutableString new];
+	}
 	[_data appendString:string];
 }
 

HTMLKit/HTMLDOCTYPEToken.m

@@ -23,13 +23,16 @@
 	self = [super init];
 	if (self) {
 		self.type = HTMLTokenTypeDoctype;
-		_name = [[NSMutableString alloc] initWithString:name];
+		_name = [name mutableCopy];
 	}
 	return self;
 }
 
 - (void)appendStringToName:(NSString *)string
 {
+	if (_name == nil) {
+		_name = [NSMutableString new];
+	}
 	[_name appendString:string];
 }
 

HTMLKit/HTMLTagToken.m

@@ -24,13 +24,16 @@
 {
 	self = [super init];
 	if (self) {
-		_tagName = [[NSMutableString alloc] initWithString:tagName];
+		_tagName = [tagName mutableCopy];
 	}
 	return self;
 }
 
 - (void)appendStringToTagName:(NSString *)string
 {
+	if (_tagName == nil) {
+		_tagName = [NSMutableString new];
+	}
 	[_tagName appendString:string];
 }
 
@@ -68,7 +71,7 @@
 
 - (NSString *)description
 {
-	return [NSString stringWithFormat:@"<%@: %p TagName=%@>", self.class, self, self.tagName];
+	return [NSString stringWithFormat:@"<%@: %p TagName=%@ Attributes=%@>", self.class, self, self.tagName, self.attributes];
 }
 
 @end
@@ -102,7 +105,7 @@
 
 - (NSString *)description
 {
-	return [NSString stringWithFormat:@"<%@: %p TagName=%@>", self.class, self, self.tagName];
+	return [NSString stringWithFormat:@"<%@: %p TagName=%@ Attributes=%@>", self.class, self, self.tagName, self.attributes];
 }
 
 @end