[librsvg] Clarify that there are no replacements for get_metadata/desc/title.

[Federico Mena Quintero <federico src gnome org>]

commit 059edbea88cfcfec32490be5afbb0325550aa436
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon Jan 7 11:41:51 2019 -0600

    Clarify that there are no replacements for get_metadata/desc/title.

 librsvg/rsvg-handle.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/librsvg/rsvg-handle.c b/librsvg/rsvg-handle.c
index 6023cd9f..a6e28348 100644
--- a/librsvg/rsvg-handle.c
+++ b/librsvg/rsvg-handle.c
@@ -890,7 +890,8 @@ rsvg_handle_get_base_uri (RsvgHandle * handle)
  *
  * Since: 2.9
  *
- * Deprecated: 2.36
+ * Deprecated: 2.36.  Librsvg does not read the metadata/desc/title elements;
+ * this function always returns #NULL.
  */
 const char *
 rsvg_handle_get_metadata (RsvgHandle * handle)
@@ -908,7 +909,8 @@ rsvg_handle_get_metadata (RsvgHandle * handle)
  *
  * Since: 2.4
  *
- * Deprecated: 2.36
+ * Deprecated: 2.36.  Librsvg does not read the metadata/desc/title elements;
+ * this function always returns #NULL.
  */
 const char *
 rsvg_handle_get_title (RsvgHandle * handle)
@@ -926,7 +928,8 @@ rsvg_handle_get_title (RsvgHandle * handle)
  *
  * Since: 2.4
  *
- * Deprecated: 2.36
+ * Deprecated: 2.36.  Librsvg does not read the metadata/desc/title elements;
+ * this function always returns #NULL.
  */
 const char *
 rsvg_handle_get_desc (RsvgHandle * handle)