Must not clash with anu built-in special characters.
# The character that marks the beginning of a delimited node
#
# Must not clash with anu built-in special characters.
fun opening_delimiter: Char is abstract
lib/markdown2/markdown_inline_parsing.nit:1125,2--1128,40
redef fun opening_delimiter do return delim
lib/markdown2/markdown_inline_parsing.nit:1258,2--44
redef fun opening_delimiter do return delimiter_char
lib/markdown2/markdown_inline_parsing.nit:1304,2--53