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Also, add code to automate such stripping in the future.  The diff
from commit addac276 to here is exactly the result of running that
code on the speeches added in commit addac276.

HTML still needs to be stripped, though.

The speech's text was duplicated, with a few very minor typographical
differences.  I went with the second copy.  This problem exists in the
source at the Miller Center site, so we should report it to them, but
in any case we might as well solve it here right away.

Thanks to Jason Levy for reporting the bug to me.

Also, remove the note in README.md about alternative sourcing for his
2019-09-25 speech before a press conference.  That speech's transcript
is now available from the Miller Center, who presumably got it from
the same White House web site page I got it from because it was
byte-for-byte the same.

As promised in commit e3312588, remove the remaining HTML elements
(mostly "<p>" and "<br>" and such) from the speech transcripts:

    $ pushd ~/src/html2text/

    $ git remote show origin | grep "Fetch URL:"
      Fetch URL: git@github.com:aaronsw/html2text.git

    $ git log -n1 | grep "^commit"
    commit 8ddc844b03042faf4875d465580ad122f9292978

    $ popd

    $ for name in *; do                                                    \
        ~/src/html2text/html2text.py --body-width=0 ${name} > ${name}.tmp; \
        mv ${name}.tmp ${name};                                            \
        git add ${name};                                                   \
      done

Thanks, Aaron.