[dev.typeparams] test: rename blank functions

This CL renames blank functions in the test/ directory so that they
don't rely on the compiler doing anything more than typechecking them.

In particular, I ran this search to find files that used blank
functions and methods:

$ git grep -l '^func.*\b_(' | xargs grep -n '^' | grep '\.go:1:' | grep -v '// errorcheck$'

I then skipped updating a few files:

* blank.go
* fixedbugs/issue11699.go
* fixedbugs/issue29870.go

  These tests specifically check that blank functions/methods work.

* interface/fail.go

  Not sure the motivation for the blank method here, but it's empty
  anyway.

* typeparam/tparam1.go

  Type-checking test, but uses "-G" (to use types2 instead of typecheck).

Updates #47446.

Change-Id: I9ec1714f499808768bd0dcd7ae6016fb2b078e5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/338094
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/test/inline.go b/test/inline.go
index 2cda07b2da..a73c0ba7b1 100644
--- a/test/inline.go
+++ b/test/inline.go
@@ -49,7 +49,7 @@ func j(x int) int { // ERROR "can inline j"
 	}
 }
 
-func _() int { // ERROR "can inline _"
+func f2() int { // ERROR "can inline f2"
 	tmp1 := h
 	tmp2 := tmp1
 	return tmp2(0) // ERROR "inlining call to h"
@@ -167,7 +167,7 @@ func (T) meth(int, int) {} // ERROR "can inline T.meth"
 
 func k() (T, int, int) { return T{}, 0, 0 } // ERROR "can inline k"
 
-func _() { // ERROR "can inline _"
+func f3() { // ERROR "can inline f3"
 	T.meth(k()) // ERROR "inlining call to k" "inlining call to T.meth"
 	// ERRORAUTO "inlining call to T.meth"
 }