all: remove duplicate "the" words in comments

all: remove duplicate "the" words in comments

Following CL 424454, using command

   rg --multiline " the\s{1,}the " *
   rg --multiline " the\s{1,}//\s{1,}the " *

all the words "the" that are repeated in comments are found.

Change-Id: I60b769b98f04c927b4c228e10f37faf190964069
Reviewed-on: https://go-review.googlesource.com/c/go/+/423836
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>