ifferent from 
standard HTML. In HTML, any sequence of white space characters is 
collapsed to a single space, If the user does not want this to happen, the
input must use non-breaking spaces "&amp;nbsp;". This makes sense in
HTML, where text layout depends dynamically on the space available. In
Graphviz, the layout is statically determined by the input, so it is
reasonable to treat ordinary space characters as non-breaking. In addition,
ignoring tabs and newlines allows the input text to be formatted for
e