Fix line_compare.py
Fix line_compare.py

an integer cannot be a callback arg, must be plot object. pass in nlines
into code directly.

also use the renderer that's returned from calling line()

DuCorey/bokeh,ptitjano/bokeh,maxalbert/bokeh,DuCorey/bokeh,justacec/bokeh,KasperPRasmussen/bokeh,azjps/bokeh,msarahan/bokeh,azjps/bokeh,phobson/bokeh,DuCorey/bokeh,htygithub/bokeh,azjps/bokeh,quasiben/bokeh,KasperPRasmussen/bokeh,quasiben/bokeh,jakirkham/bokeh,schoolie/bokeh,ericmjl/bokeh,schoolie/bokeh,Karel-van-de-Plassche/bokeh,draperjames/bokeh,percyfal/bokeh,bokeh/bokeh,percyfal/bokeh,gpfreitas/bokeh,aiguofer/bokeh,clairetang6/bokeh,timsnyder/bokeh,Karel-van-de-Plassche/bokeh,phobson/bokeh,Karel-van-de-Plassche/bokeh,ericmjl/bokeh,Karel-van-de-Plassche/bokeh,draperjames/bokeh,stonebig/bokeh,timsnyder/bokeh,timsnyder/bokeh,ericmjl/bokeh,rs2/bokeh,aiguofer/bokeh,percyfal/bokeh,bokeh/bokeh,msarahan/bokeh,draperjames/bokeh,maxalbert/bokeh,aiguofer/bokeh,aavanian/bokeh,clairetang6/bokeh,aavanian/bokeh,bokeh/bokeh,philippjfr/bokeh,aiguofer/bokeh,phobson/bokeh,DuCorey/bokeh,philippjfr/bokeh,gpfreitas/bokeh,schoolie/bokeh,rs2/bokeh,schoolie/bokeh,DuCorey/bokeh,KasperPRasmussen/bokeh,aavanian/bokeh,dennisobrien/bokeh,azjps/bokeh,schoolie/bokeh,ericmjl/bokeh,msarahan/bokeh,aiguofer/bokeh,rs2/bokeh,timsnyder/bokeh,azjps/bokeh,stonebig/bokeh,jakirkham/bokeh,rs2/bokeh,aavanian/bokeh,stonebig/bokeh,philippjfr/bokeh,draperjames/bokeh,KasperPRasmussen/bokeh,philippjfr/bokeh,ptitjano/bokeh,maxalbert/bokeh,ericmjl/bokeh,percyfal/bokeh,mindriot101/bokeh,msarahan/bokeh,Karel-van-de-Plassche/bokeh,mindriot101/bokeh,maxalbert/bokeh,KasperPRasmussen/bokeh,quasiben/bokeh,phobson/bokeh,stonebig/bokeh,htygithub/bokeh,justacec/bokeh,dennisobrien/bokeh,bokeh/bokeh,draperjames/bokeh,bokeh/bokeh,jakirkham/bokeh,justacec/bokeh,jakirkham/bokeh,timsnyder/bokeh,phobson/bokeh,ptitjano/bokeh,percyfal/bokeh,ptitjano/bokeh,gpfreitas/bokeh,philippjfr/bokeh,gpfreitas/bokeh,justacec/bokeh,mindriot101/bokeh,clairetang6/bokeh,dennisobrien/bokeh,jakirkham/bokeh,ptitjano/bokeh,htygithub/bokeh,rs2/bokeh,dennisobrien/bokeh,dennisobrien/bokeh,aavanian/bokeh,htygithub/bokeh,clairetang6/bokeh,mindriot101/bokeh