[libchamplain] Add documentation for TMSY coordinate

[JiÅÃ Techet <jiritechet src gnome org>]

commit b68be75e999df8fb3d2d958677d021c65dea2b43
Author: JiÅÃ Techet <techet gmail com>
Date:   Mon Aug 13 15:02:37 2012 +0200

    Add documentation for TMSY coordinate

 champlain/champlain-network-tile-source.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/champlain/champlain-network-tile-source.c b/champlain/champlain-network-tile-source.c
index b10d95b..c13299d 100644
--- a/champlain/champlain-network-tile-source.c
+++ b/champlain/champlain-network-tile-source.c
@@ -367,7 +367,8 @@ champlain_network_tile_source_get_uri_format (ChamplainNetworkTileSource *tile_s
  * A URI format is a URI where x, y and zoom level information have been
  * marked for parsing and insertion.  There can be an unlimited number of
  * marked items in a URI format.  They are delimited by "#" before and after
- * the variable name. There are 3 defined variable names: X, Y, and Z.
+ * the variable name. There are 4 defined variable names: X, Y, Z, and TMSY for
+ * Y in TMS coordinates.
  *
  * For example, this is the OpenStreetMap URI format:
  * "http://tile.openstreetmap.org/\#Z\#/\#X\#/\#Y\#.png";