net/url: update net/url split comment

Fixes #35735

Change-Id: I4618ffcd1bcf9a7506468b9a1443bc4a2f7f3138
GitHub-Last-Rev: edaf780d3d8b4e01f3dd6750275ff50a39eb2113
GitHub-Pull-Request: golang/go#35736
Reviewed-on: https://go-review.googlesource.com/c/go/+/208297Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/net/url/url.go

@@ -452,7 +452,7 @@ func getscheme(rawurl string) (scheme, path string, err error) {
 }
 
 // split slices s into two substrings separated by the first occurrence of
-// sep. If cutc is true then sep is included with the second substring.
+// sep. If cutc is true then sep is excluded from the second substring.
 // If sep does not occur in s then s and the empty string is returned.
 func split(s string, sep byte, cutc bool) (string, string) {
 	i := strings.IndexByte(s, sep)