cmd/go/internal/str: simplify HasPathPrefix by epsilon

Pointed out in CL 122396.
An empty prefix has already been handled above.

Change-Id: Ib94df0a9c8c0517f932b90126232111caa9ad289
Reviewed-on: https://go-review.googlesource.com/124797
Reviewed-by: Bryan C. Mills <bcmills@google.com>

diff --git a/src/cmd/go/internal/str/path.go b/src/cmd/go/internal/str/path.go
index 65cd6394362d196eb84e05d75196238e903e386f..a9b4d759a6b051fea2e3d83e9ff932e3d1bcac4d 100644 (file)
--- a/src/cmd/go/internal/str/path.go
+++ b/src/cmd/go/internal/str/path.go
@@ -19,7 +19,7 @@ func HasPathPrefix(s, prefix string) bool {
                return true
        }
        if len(s) > len(prefix) {
-               if prefix != "" && prefix[len(prefix)-1] == '/' || s[len(prefix)] == '/' {
+               if prefix[len(prefix)-1] == '/' || s[len(prefix)] == '/' {
                        return s[:len(prefix)] == prefix
                }
        }