In the Plane style, all arguments are placed
in the same line, separated by a single space:
(autoload "appload" '("appload"))
The Plane style is applied to an expression
when all the following conditions are met:
The
expression's last character position does not exceed the value of
the Right Text Margin environment option.
The
expression's printing length is less than the value of the Approximate Line
Length environment option (that is, last character position minus starting
indentation position is less than this value).
The
expression does not contain embedded comments with Newline characters.
