Hello! This is finally in: http://git.savannah.gnu.org/cgit/guile.git/commit/?id=620c89651ae54f8f35c3d0926f8c2c36c3fdd174 .
This required some more work to handle nested comments (as specified), and to make it possible to override the syntax with ‘read-hash-extend’ as Neil suggested. Thanks, Ludo’.
