mutt, bidi, t-prot solution

This is for anyone of you who use mutt as your e-mail client, and like
me until just a few minutes ago, couldn't get the `t-prot' display
pre-processor to play nicely with bidi (using the command-line `bidiv'
program).

The trick that's working for me on the emails I currently have
available to test with, is to set `bidiv's line width parameter very
very wide. Like 400 characters wide!

Here's the relevant snippet from my .muttrc:

#+BEGIN_SRC conf
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Display filtering                                          ┃
# ┃                                                            ┃
# ┃ M-0   Turn off                                             ┃
# ┃ M-1   Turn on t-prot / bidiv                               ┃
# ┃                                                            ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
set my_tprot='bidiv -w400 | t-prot -cmekatlS --max-lines=250 --bigq \
--pgp-short --pgp-move-vrf -Mmutt -L/etc/t-prot/footers \
-A/etc/t-prot/ads'

set display_filter=$my_tprot

macro generic \e0 ":unset display_filter\n" \
  "Turn OFF all display filters"
macro generic \e1 ":set display_filter='$my_tprot'\n" \
  "Turn ON tprot / bidiv display filter"

macro pager \e0 \
  ":unset display_filter; exec exit\n:exec display-message\n" \
  "Turn OFF all display filters"
macro pager \e1 \
  ":set display_filter='$my_tprot'; exec exit\n:exec display-message\n" \
  "Turn ON tprot / bidiv display filter"

# highlight tprot elements
color body      brightmagenta           default "^\\[---.*"
color body      green                   default "^#v[-+]"
#+END_SRC


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