go.tools/present: Remove formatting comments (HL, OMIT) from raw code.
go.tools/present: Remove formatting comments (HL, OMIT) from raw code.

LGTM=adg
R=adg
CC=golang-codereviews
https://codereview.appspot.com/68870043

t-yuki/go.tools.old,t-yuki/go.tools.old,t-yuki/go.tools.old