Skips whitespace tokens including newlines if skip_nl is true
# File lib/rdoc/parser/ruby_tools.rb, line 124
def skip_tkspace(skip_nl = true) # HACK dup
tokens = []
while TkSPACE === (tk = get_tk) or (skip_nl and TkNL === tk) do
tokens.push tk
end
unget_tk tk
tokens
end