srcextract: HTML-escape output if so desired
srcextract: HTML-escape output if so desired

This functionality was removed with CL 4169041.

Minor simplifications.

R=r, adg
CC=golang-dev
http://codereview.appspot.com/4171042

gnanderson/go,pombredanne/go-deleteme,dsriram/golang,ssrl/go,gnanderson/go,gnanderson/go,apparentlymart/golang,gnanderson/go,ssrl/go,apparentlymart/golang,dsriram/golang,pombredanne/go-deleteme,ssrl/go,dsriram/golang,tv42/old-go,tv42/old-go,apparentlymart/golang,dsriram/golang,gnanderson/go,apparentlymart/golang,ssrl/go,pombredanne/go-deleteme,pombredanne/go-deleteme,apparentlymart/golang,dsriram/golang,tv42/old-go,gnanderson/go,pombredanne/go-deleteme,dsriram/golang,apparentlymart/golang,ssrl/go,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,dsriram/golang,tv42/old-go,tv42/old-go,ssrl/go,ssrl/go,gnanderson/go,tv42/old-go,tv42/old-go