Minor indentation tweak.

src/content.lisp

@@ -41,7 +41,7 @@
   "Return a version of STRING suitable for use as a URL."
   (let ((slugified (remove-if-not #'slug-char-p
                                   (substitute-if #\- #'unicode-space-p string))))
-	(if (zerop (length slugified))
+	  (if (zerop (length slugified))
         (error "Post title '~a' does not contain characters suitable for a slug!" string )
         slugified)))