fix(text): compose every org src-block marker to the lambda glyph

The prettify-symbols alist already mapped #+begin_src and #+end_src to a lambda, but only some markers actually rendered as one. prettify-symbols-default-compose-p decides composition from a syntax heuristic on the characters around the match, and inside org's src-block fontification that heuristic vetoed most of the markers. In todo.org only one of five composed.

I added cj/prettify-compose-block-markers-p, a compose predicate that always composes the block markers (case-insensitive, since the alist carries upcased variants) and defers to the default for everything else like lambda. Every marker composes now. Tests cover the marker branch and the deferral to the default.

0 files changed, 0 insertions, 0 deletions