Redmine Wiki Admonition

Before:

desc "Adds a `#{admonition}` block\n" \
               "Usage:\n" \
               "<pre>{{#{admonition}(#{admonition.upcase})\n" \
               "This is a #{admonition} admonition.\n" \
               "}}</pre>\n"

After:

desc "Adds a `#{admonition}` block\n" \
               "Example:\n" \
               "{{#{admonition}(#{admonition.upcase})\n" \
               "Put your content here.\n" \
               "}}\n"