If the enclosing value spec specifies a type on the LHS, we now prefer
completions of that type on the RHS. For example:
i := 123
var foo int = // prefer "i" since we know we want an int
I also added a special case to lexical() to know that we can't offer
objects defined on the LHS as completions on the RHS. For example:
var foo int = // don't offer "foo" as completion
Change-Id: I8e24245a2bc86a29887360e7f642a4cbb87fa6ca
Reviewed-on: https://go-review.googlesource.com/c/tools/+/212401
Run-TryBot: Muir Manders <muir@mnd.rs>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
