I'd like to see the addition of a new mh-format function "%(printf)".
Building and customizing message parts using "%(putstr)" somewhat
works, but is seriously ugly, because %(putstr) compresses repeated
whitespace within a string and doesn't parse printf formatting such as
"\n".
In theory, not so bad ... but actually kind of complicated. First off,
technically \n isn't printf() formatting. Okay, fine. I am a little
unclear on how you envision this working ... are you suggesting that
the argument to printf() would be a printf format and it would operate
on str? Or something else? Also, you can put \n in mh-format files
right now and the right thing happens ... but I'm not sure what takes
care of that.
--Ken
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