relax unicode parsing rules

NFKC was previously used for all text. Now, we use NFKC for all args but
the last, which may be free text. This arg is normalized with NFC to
allow for formatting characters.

irc/commands.go

@@ -2,6 +2,7 @@ package irc
 
 import (
 	"code.google.com/p/go.crypto/bcrypt"
+	"code.google.com/p/go.text/unicode/norm"
 	"errors"
 	"fmt"
 	"regexp"
@@ -99,10 +100,11 @@ var (
 func parseLine(line string) (StringCode, []string) {
 	var parts []string
 	if colonIndex := strings.IndexRune(line, ':'); colonIndex >= 0 {
-		lastArg := line[colonIndex+len(":"):]
-		line = line[:colonIndex-len(" ")]
+		lastArg := norm.NFC.String(line[colonIndex+len(":"):])
+		line = norm.NFKC.String(line[:colonIndex-len(" ")])
 		parts = append(spacesExpr.Split(line, -1), lastArg)
 	} else {
+		line = norm.NFKC.String(line)
 		parts = spacesExpr.Split(line, -1)
 	}
 	return StringCode(strings.ToUpper(parts[0])), parts[1:]