[346] Update paste style documentation

Bug: #346
Signed-off-by: Séraphin Costa <seraphin.costa@obeosoft.com>

plugins/org.eclipse.sirius.doc/doc/user/diagrams/Diagrams.html

@@ -1385,6 +1385,7 @@ <h3 id="paste_style">Paste style</h3>
 		<p>	
 			<img border="0" src="images/diagram_editor_paste_style.png"/>
 		</p>
+		<p>Note: an edge style cannot be applied to a container or node but a container or node style can be applied to a edge.</p>
 		<h3 id="paste_image">Paste image from clipboard</h3>
 		<p>It is also possible to paste an image from the clipboard to a node or container. To do this, copy the image in your clipboard, select a node and click on the button &#8220;Paste image from clipboard&#8221; (see picture below). The image is saved as a PNG file in the workspace, in an &#8220;images&#8221; folder and the selected element has a workspace image style that references this image.</p>
 		<p>	

plugins/org.eclipse.sirius.doc/doc/user/diagrams/Diagrams.textile

@@ -812,6 +812,8 @@ To copy a style from one element to another :
 
 	!images/diagram_editor_paste_style.png!
 
+Note: an edge style cannot be applied to a container or node but a container or node style can be applied to a edge.
+
 h3(#paste_image). Paste image from clipboard
 
 It is also possible to paste an image from the clipboard to a node or container. To do this, copy the image in your clipboard, select a node and click on the button "Paste image from clipboard" (see picture below). The image is saved as a PNG file in the workspace, in an "images" folder and the selected element has a workspace image style that references this image.