[gimp-help-2] Addedd small description

[Marco Ciampa <marcoc src gnome org>]

commit 58d2b3e4add991c225e3759a81f0b44e8f4baa5d
Author: Marco Ciampa <ciampix libero it>
Date:   Sat Jun 10 15:41:11 2017 +0200

    Addedd small description

 src/toolbox/transform/unified-transform.xml |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/toolbox/transform/unified-transform.xml b/src/toolbox/transform/unified-transform.xml
index c766b30..4bdfae6 100644
--- a/src/toolbox/transform/unified-transform.xml
+++ b/src/toolbox/transform/unified-transform.xml
@@ -341,7 +341,8 @@
             When this option is unchecked (default), the opposite edge is fixed 
             and the pivot moves with shearing. When the option 
             is checked, shearing is performed around a fixed pivot and the 
-            opposite side is sheared by the same amount.           
+            opposite side is sheared by the same amount, but in the opposite
+           direction.
           </para>
           <para>
             <guilabel>Perspective</guilabel>: when this option is checked, the