fix typos

parse.go

@@ -146,7 +146,7 @@ func ParseCommands(cmdString string) ([]string, error) {
 			}
 			return cmds, nil
 		}
-		// evalute a rune
+		// evaluate a rune
 		c := cmdString[next]
 		switch c {
 		case ' ':

selector.go

@@ -495,7 +495,7 @@ func parseNthPseudo(cmd string) (PseudoClass, error) {
 	nthString := cmd[i+1:]
 	i = strings.IndexRune(nthString, ')')
 	if i < 0 {
-		return nil, fmt.Errorf("Unmatched '(' for psuedo class %s", pseudoName)
+		return nil, fmt.Errorf("Unmatched '(' for pseudo class %s", pseudoName)
 	} else if i != len(nthString)-1 {
 		return nil, fmt.Errorf("%s(n) must end selector", pseudoName)
 	}