libgo: update to Go 1.13beta1 release

    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/193497

From-SVN: r275473

1 files changed, 16 insertions, 0 deletions

diff --git a/libgo/go/bufio/example_test.go b/libgo/go/bufio/example_test.go
index 4666e6d..8885d40 100644
--- a/libgo/go/bufio/example_test.go
+++ b/libgo/go/bufio/example_test.go
@@ -31,6 +31,19 @@ func ExampleScanner_lines() {
 	}
 }
 
+// Return the most recent call to Scan as a []byte.
+func ExampleScanner_Bytes() {
+	scanner := bufio.NewScanner(strings.NewReader("gopher"))
+	for scanner.Scan() {
+		fmt.Println(len(scanner.Bytes()) == 6)
+	}
+	if err := scanner.Err(); err != nil {
+		fmt.Fprintln(os.Stderr, "shouldn't see an error scanning a string")
+	}
+	// Output:
+	// true
+}
+
 // Use a Scanner to implement a simple word-count utility by scanning the
 // input as a sequence of space-delimited tokens.
 func ExampleScanner_words() {
@@ -94,6 +107,9 @@ func ExampleScanner_emptyFinalToken() {
 				return i + 1, data[:i], nil
 			}
 		}
+		if !atEOF {
+			return 0, nil, nil
+		}
 		// There is one final token to be delivered, which may be the empty string.
 		// Returning bufio.ErrFinalToken here tells Scan there are no more tokens after this
 		// but does not trigger an error to be returned from Scan itself.