Moved the region's add method to the general container abstraction since such
functionality is useful for other nodes such as table cells provided by the
table parser.
1 #language en_GB
2 # A directive
3 Hello
4 # Visible non-comment
5 6 {{{{#!wiki
7 ## A comment
8 9 # Visible non-comment
10 ### Another comment
11 }}}}
12 13 {{{#!wiki
14 # A directive
15 ## A comment
16 Goodbye
17 }}}