[libsoup] Improve documentation of soup_uri_normalize

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 52690b8ba673b595095f36ddf6e6b5c94373e52c
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Mon Feb 8 19:24:35 2016 -0600

    Improve documentation of soup_uri_normalize
    
    The docs do not mention anything about %-encoding, but that's part of
    the normalization since 226f6382.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=761742

 libsoup/soup-uri.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libsoup/soup-uri.c b/libsoup/soup-uri.c
index ccb5c04..dc1b6b6 100644
--- a/libsoup/soup-uri.c
+++ b/libsoup/soup-uri.c
@@ -868,7 +868,8 @@ uri_normalized_copy (const char *part, int length,
  * @unescape_extra: (allow-none): reserved characters to unescape (or %NULL)
  *
  * %<!-- -->-decodes any "unreserved" characters (or characters in
- * @unescape_extra) in @part.
+ * @unescape_extra) in @part, and %<!-- -->-encodes any non-ASCII
+ * characters, spaces, and non-printing characters in @part.
  *
  * "Unreserved" characters are those that are not allowed to be used
  * for punctuation according to the URI spec. For example, letters are