- fix regexp once more in doc.go:

- fix regexp once more in doc.go:
  comment markers must only be stripped if they are
  at the very beginning otherwise comments that contain
  code with comments get screwed up (the ast delivers clean
  comments with no junk before or after)

- fix indentation in google/net/rpc/rpc.go which screwed up
  godoc formatting

R=rsc
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=29223
CL=29267