# With no .gomodproxy supporting files, we use the GOPROXY from
# the environment.
env GOPROXY=0.1.2.3
unquote file.txt
testscript -v file.txt

-- file.txt --
>go env
>[!windows] [!go1.21] stdout '^GOPROXY="0.1.2.3"$'
>[!windows] [go1.21] stdout '^GOPROXY=''0.1.2.3''$'
>[windows] stdout '^set GOPROXY=0.1.2.3$'
