Anonymous struct quick fixes should provide more information on
which struct they will fill. This adds the first fields of an
anonymous struct to the fill title.
Updates golang/go#48563
Change-Id: I42cee2e8b1b9405ac2e2e8cfb8deb2c7710c3056
Reviewed-on: https://go-review.googlesource.com/c/tools/+/351591
Trust: Suzy Mueller <suzmue@golang.org>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>