# File vpp, line 316 def find_viewer if @viewer # before looking for this program, strip off any arguments: executable(@viewer.split.shift) or quit("\#{@viewer} was specified for viewing\nin an rc file, but is was not found in PATH\n(rc files: \#{@rcfiles}\n",1) else VIEWERS.each do |v| if executable(v) @viewer = v break end end @viewer or quit("no valid pdf viewer could be found",1) end end