80 char line limit, and we should stop the convention

[Xah Lee]

the 80-char limit in unixes, and the convention to truncate/format
file no more than 80 chars per line in unix email or source code (such
as emacs's fill-paragraph), are from punch cards.

we should stop the habit of formatting lines to 80 chars, in source
code. e.g. stop using any form of fill-paragraph.

also, am going to stop formatting my elisp function's doc string to 80
chars.

instead, format them by semantic unit. e.g. by paragraph.

Reference and further readings:

• 1st video at http://yuiblog.com/crockford/

• http://en.wikipedia.org/wiki/Punched_card

• 〈Unix, RFC, Line Truncation〉
http://xahlee.org/UnixResource_dir/writ/truncate_line.html

• 〈Programing: the Harm of Hard-wrapping Lines〉
http://xahlee.org/UnixResource_dir/writ/hard-wrap.html

 Xah