cmd/cue: non-mod command does not suggest running 'cue mod fix' on missing language.version

[myitcv]

What version of CUE are you using (cue version)?

$ cue version
cue version v0.0.0-20240614115342-59e276a47f70

go version go1.22.3
      -buildmode exe
       -compiler gc
  DefaultGODEBUG httplaxcontentlength=1,httpmuxgo121=1,tls10server=1,tlsrsakex=1,tlsunsafeekm=1
     CGO_ENABLED 1
          GOARCH arm64
            GOOS linux
             vcs git
    vcs.revision 59e276a47f706c9aaa21b1c638ae5826ca27d88d
        vcs.time 2024-06-14T11:53:42Z
    vcs.modified false
cue.lang.version v0.10.0

Does this issue reproduce with the latest release?

Yes

What did you do?

# cue mod tidy
! exec cue mod tidy
stderr 'no language version declared in module.cue; run ''cue mod fix'''

# cue export
! exec cue export
stderr 'no language version declared in module.cue; run ''cue mod fix'''

-- cue.mod/module.cue --
module: "mod.example"
-- x.cue --
package x

x: 5

What did you expect to see?

Passing test.

What did you see instead?

# cue mod tidy (0.012s)
# cue export (0.010s)
> ! exec cue export
[stderr]
no language version declared in module.cue
[exit status 1]
> stderr 'no language version declared in module.cue; run ''cue mod fix'''
FAIL: /tmp/testscript803729477/repro.txtar/script.txtar:7: no match for `no language version declared in module.cue; run 'cue mod fix'` found in stderr