URxvt has been great but just can't keep up.  Alacritty is the new one.

Thanks URxvt!

Useful in places where keyboard shortcut is not available, such as
primary clipboard in in almost all GUI applications.

Handy when working with Python module spec files which tend to use
GitHub or PyPi links.

Move bb() double-functionatity (sleep+throw alarm but also tell about
it) to snore() and keep bb() without info output.

Also add dotsleep() to double down on the outputting by producing dots
while sleeping.

(Yeah, I know, weirdly specific and likely not very useful.)

Turns out what also breaks it is what might be a bug in Bash causing
HIST* vars in Debian's .bashrc trim the history immediately, before wwe
get a chance to set it to a huge number.

The workaround -- which cannot be done safely within bashum -- is to
comment any HIST* variables in your .bashrc.

We already call it that way internally.

On Fedora, commonmark is from nodejs-commonmark, which is long-term
broken.

lrep() and prep() repeat every line, or whole stream, on stdin
$1 times.

People can now run

    __bashum_run_n 100 echo hello world

and it will print "hello world" 100 times, instead of just running
`echo` 100 times and ignoring the `hello world` part.