rvinterf: begin change to backslash escape output format Right now throughout the rvinterf suite, any time we emit output that is expected to be ASCII, but may contain non-printable garbage, we use 'cat -v' form of garbage character representation. Unfortunately, this transformation is lossy (can't be reversed 100% reliably in the user's wetware), hence we would like to migrate to C-style backslash escapes, including doubling of any already-present backslashes - this escape mechanism is lossless. Begin this change by converting the output of RV and L1 traces in rvinterf and rvtdump.

# This PWT example is an attempt to turn the "Danza de Astureses" melody
# from mmiMelody_data.c (defunct C file in TI's BMI code) into an actually
# playable PWT melody.  The command_2 word is guessed to be the note duration
# in ms, with the TDMA_12 length being a bogon.

c5	64	13
d5	64	13
e5	64	13
d5	64	5
e5	64	5
f5	64	5
e5	64	5
d5	64	5
c5	64	5
b4	64	13
g4	64	13
c5	64	13
d5	64	13
e5	64	13
d5	64	5
e5	64	5
fs5	64	5
d5	64	5
e5	64	5
f5	64	5
g5	64	26