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types2: use strings.Builder in errors.go

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Permissible now because go1.17 is used for bootstrapping.

Change-Id: Ia6f314f9314eda1cc42002dcbdfa551196df76f0
Reviewed-on: https://go-review.googlesource.com/c/go/+/427554
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Run-TryBot: hopehook <hopehook@golangcn.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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hopehook 2022-09-01 21:40:08 +08:00 committed by Gopher Robot
parent 1280ae7856
commit b2110bcdde
1 changed files with 1 additions and 2 deletions
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3
src/cmd/compile/internal/types2/errors.go
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@ -300,8 +300,7 @@ func posFor(at poser) syntax.Pos {
// stripAnnotations removes internal (type) annotations from s.
func stripAnnotations(s string) string {
// Would like to use strings.Builder but it's not available in Go 1.4.
var b bytes.Buffer
var b strings.Builder
for _, r := range s {
// strip #'s and subscript digits
if r < '₀' || '₀'+10 <= r { // '₀' == U+2080