new primitives: append-byte, append-byte-hex

These are variants of write-byte-buffered and print-byte-buffered respectively
that operate on in-memory `stream`s rather than `buffered-file`s.

They don't operate on files, so we'll avoid using the prefix 'write-'.

1 files changed, 0 insertions, 0 deletions

diff --git a/subx/apps/crenshaw2-1 b/subx/apps/crenshaw2-1
index b5614efb..8a927771 100755
--- a/subx/apps/crenshaw2-1
+++ b/subx/apps/crenshaw2-1
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