Fix language tag and improve templates

pages/edit.html

@@ -1,7 +1,7 @@
-{{define "main"}}
+{{ define "main" }}
 <form method="POST">
     <h2><label for="text">{{ .Title }}:</label></h2>
     <textarea id="text" cols="40" rows="15" name="text">{{ .Content }}</textarea>
     <button type="submit">{{ translatableText "button.save" }}</button>
 </form>
-{{end}}
+{{ end }}