* mes.c (write_byte): Rename from write_char.
* module/mes/display.mes (display): Fixes for write: char, closure, procedure.
(write-char, write, with-output-to-string): New functions.
* tests/read.test: Include base-0 to see some output.
* tests/display.test: New file.
* GNUmakefile (TESTS): Add it.
