Correct boostrap takeover vulnerability
Reindent 'simple' section to 80 chars per line
Use more efficient dot file representation

Dotfiles can combine targets of common sources, so instead of

    A -> X
    A -> Y
    A -> Z

one can simply write

    A -> {X, Y, Z}

Which shrinks the dotfile line count by a factor of 5.7. In the future,
the drawing server will generate this format automatically; candidate
functions to do so have been introduced in

    c59eadc94ca7d10dbfad467ac8278ec010f4780e

already.