Source position information for AST nodes.
Contains the start and end positions as {line, column} tuples,
both 1-based. These values reflect the original source positions
from parsing and are not updated when the AST is modified programmatically.
See https://docs.rs/comrak/latest/comrak/nodes/struct.Sourcepos.html
Summary
Types
@type t() :: %MDEx.Sourcepos{ end: {pos_integer(), pos_integer()}, start: {pos_integer(), pos_integer()} }