[aisleriot] Fixed typo

[Marek Černocký <mcernocky src gnome org>]

commit adda26830685a571c1e4c8d655a2a4dd74650715
Author: Marek Černocký <marek manet cz>
Date:   Tue Apr 14 12:13:52 2015 +0200

    Fixed typo

 help/C/escalator.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/C/escalator.xml b/help/C/escalator.xml
index a7fdbca..d807a52 100644
--- a/help/C/escalator.xml
+++ b/help/C/escalator.xml
@@ -67,7 +67,7 @@
   <para>
          All exposed cards in the pyramid are available for play.  Build on to
          the Waste from these available cards whenever possible by playing a
-         card with a rank immediately above or immediately below the rack of
+         card with a rank immediately above or immediately below the rank of
          the top card in the Waste.  Aces are both above Kings and below
          Deuces.
   </para>