Fix WikiCanonicalFormNamespaceEsc

gowiki.go

@@ -21,6 +21,7 @@ import (
 	"html"
 	"regexp"
 	"strings"
+	"unicode"
 )
 
 var DebugLevel int = 0
@@ -152,7 +153,9 @@ func (namespaces Namespaces) WikiCanonicalFormNamespaceEsc(l string, defaultName
 		anchor = html.UnescapeString(anchor)
 	}
 	if len(article) > 0 {
-		article = strings.ToUpper(article[0:1]) + article[1:]
+		runes := []rune(article)
+		runes[0] = unicode.ToUpper(runes[0])
+		article = string(runes)
 	}
 	return WikiLink{Namespace: namespace, PageName: article, Anchor: anchor}
 }