internal/lsp: fix test failure introduced in CL 185058
internal/lsp: fix test failure introduced in CL 185058

Failed to properly check the try-bot result in CL 185058. Hence didn't
spot the LSP tests that also verify offset behaviour. This CL fixes
those tests to align the LSP tests with the change introduced in CL
185058.

Change-Id: Ia81ab6db7a2c3a4729d8ef73205b6071af270b00
Reviewed-on: https://go-review.googlesource.com/c/tools/+/185220
Run-TryBot: Paul Jolly <a027184a55211cd23e3f3094f1fdc728df5e0500@myitcv.org.uk>
Run-TryBot: Rebecca Stambler <d7cf11e5f299d88ea8348366a9fc4f7c335c3afa@golang.org>
Reviewed-by: Rebecca Stambler <d7cf11e5f299d88ea8348366a9fc4f7c335c3afa@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

golang/tools,golang/tools,golang/tools,golang/tools,golang/tools