Fix extra spaces on last leaf in bundle (#1189)

Fixes #1188.

clone/cmd/sumdbclone/internal/client/sumdb.go

@@ -121,10 +121,14 @@ func (c *SumDBClient) tilePath(offset int) string {
  return nStr
 }
 
+// dataToLeaves splits the raw bytes received when requesting a data
+// tile into the constituent leaf data chunks. The splitting is performed
+// based on two consecutive newlines, and each returned leaf terminates
+// with a single newline.
 func dataToLeaves(data []byte) [][]byte {
  leaves := bytes.Split(data, []byte{'\n', '\n'})
  for i, l := range leaves {
- leaves[i] = append(l, '\n')
+ leaves[i] = append(bytes.TrimSpace(l), '\n')
  }
  return leaves
 }

clone/cmd/sumdbclone/internal/client/sumdb_test.go

@@ -63,6 +63,9 @@ func TestLeavesAtOffset(t *testing.T) {
  if l[len(l)-1] != '\n' {
  t.Errorf("expected string terminating in newline, got: %x", l)
  }
+ if l[len(l)-2] == '\n' {
+ t.Errorf("expected string terminating in single newline, but got: %x", l)
+ }
  expStart := "golang.org/x/"
  if got, want := string(l[:len(expStart)]), expStart; got != want {
  t.Errorf("got prefix '%s', wanted '%s'", got, want)

go.mod

@@ -1,6 +1,7 @@
 module github.com/google/trillian-examples
 
-go 1.21
+go 1.21.0
+
 toolchain go1.22.4
 
 require (