ErrorHighlight::Spotter#spot_colon2

# File tmp/rubies/ruby-4.1.0-preview1/lib/error_highlight/base.rb, line 644
def spot_colon2
  nd_parent, const = @node.children
  if nd_parent.last_lineno == @node.last_lineno
    fetch_line(nd_parent.last_lineno)
    @beg_column = nd_parent.last_column
    @end_column = @node.last_column
  else
    fetch_line(@node.last_lineno)
    if @snippet[...@node.last_column].match(/#{ Regexp.quote(const) }\z/)
      @beg_lineno = @end_lineno = @node.last_lineno
      @beg_column = $~.begin(0)
      @end_column = $~.end(0)
    end
  end
end