internal/trace/raw: use strings.Cut instead of strings.SplitN 2
Replace strings.SplitN with strings.Cut for better performance and readability.
Change-Id: Ia245db62d8c2d1686887cb455f492db15606b57a
GitHub-Last-Rev:
e00e164688f79d85d34fdf0d4ef126387ec6c0a0
GitHub-Pull-Request: golang/go#75257
Reviewed-on: https://go-review.googlesource.com/c/go/+/700915
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>