ex-03: Added solution for rgb converter

exercise-03-rgb/main.c

@@ -40,7 +40,6 @@ int main() {
 		return EXIT_FAILURE;
 	}
 
-	// Strip out any whitespaces
 	char* dst = input;
 	for(char * src = input; *src; src++) {
 		if(!isspace(*src)) {
@@ -50,10 +49,6 @@ int main() {
 	*dst = '\0';
 
 	int trimmed_len = strlen(input);
-
-	// Check whether the provided input
-	// starts with rgb(
-	// and ends with )
 	if(strncmp(input, "rgb(", 4) != 0 || input[trimmed_len - 1] != ')') {
 		debug("%s not in rgb(xxx) format", input);
 		return invalid_input();
@@ -65,13 +60,10 @@ int main() {
 	char* token = strtok(slice, ",");
 
 	for(int i = 0; i < 3; i++) {
-		// strtok reached end prematurely
 		if(token == NULL) {
 			debug("Too few numbers");
 			return invalid_input();
 		}
-
-		// Not a number
 		if(!is_numeric(token)) {
 			debug("%s is not a number", token);
 			return invalid_input();