[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, 3 insertions, 3 deletions

diff --git a/test/escape_goto.go b/test/escape_goto.go
index f024a9afe3..90da5a2151 100644
--- a/test/escape_goto.go
+++ b/test/escape_goto.go
@@ -10,7 +10,7 @@ package escape
 
 var x bool
 
-func _() {
+func f1() {
 	var p *int
 loop:
 	if x {
@@ -22,7 +22,7 @@ loop:
 	_ = p
 }
 
-func _() {
+func f2() {
 	var p *int
 	if x {
 	loop:
@@ -33,7 +33,7 @@ func _() {
 	_ = p
 }
 
-func _() {
+func f3() {
 	var p *int
 	if x {
 	loop: