Description for table4 example7

My original patch was based on the online version which was apparently out of date.

In the meantime someone changed the description of example7 instead of the example. I think this is better because
otherwise example 6 and 7 are basically the same.

doc/developer-guidelines.sgml

@@ -307,11 +307,11 @@
 					</row>
 					<row>
 						<entry>check_stuff -c5:6</entry>
-						<entry>Critical if "stuff" is outside of 5:6</entry>
+						<entry>Critical if "stuff" is less than 5 or more than 6</entry>
 					</row>
 					<row>
 						<entry>check_stuff -c@10:20</entry>
-						<entry>Critical if "stuff" is less than 10 or over 20</entry>
+						<entry>OK if stuff is less than 10 or higher than 20, otherwise critical </entry>
 					</row>
 				</tbody>
 			</tgroup>