Fix a simple mistake with pattern space, and add a test for it
diff --git a/testsuite/sed/sed-append-hold-space-to-pattern-space b/testsuite/sed/sed-append-hold-space-to-pattern-space
new file mode 100644
index 0000000..6dda80f
--- /dev/null
+++ b/testsuite/sed/sed-append-hold-space-to-pattern-space
@@ -0,0 +1,13 @@
+busybox sed 'G'>output <<EOF
+a
+b
+c
+EOF
+cmp -s output - <<EOF
+a
+
+b
+
+c
+
+EOF