findrule mostly borrows the interface from GNU find(1) to provide a
command-line interface onto the File::Find::Rule heirarchy of modules.
The syntax for expressions is the rule name, preceded by a dash,
followed by an optional argument. If the argument is an opening
parenthesis it is taken as a list of arguments, terminated by a
find -file -name ( foo bar )
files named foo or bar, below the current directory.
find -file -name foo -bar
files named foo, that have pubs (for this is what our ficticious
bar clause specifies), below the current directory.
find -file -name ( -bar )
files named -bar, below the current directory. In this case if
wed have omitted the parenthesis it would have parsed as a call to
name with no arguments, followed by a call to -bar.