fix: newline before closing fence in nvchecker stanza echov1.2.5

The body branch used printf '%s' (no trailing newline) so the closing
fence glued onto the last body line. Use printf '%s\n'. Regression test
T16 asserts the fence sits on its own line.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/mkhint b/mkhint
index 5bb3a69..1d7c86d 100755
--- a/mkhint
+++ b/mkhint
@@ -1041,7 +1041,7 @@ EOF
     echo "────────────────────────────"
     printf '%s\n' "$label"
     if [[ -n "$body" ]]; then
-        printf '%s' "$body"
+        printf '%s\n' "$body"
     else
         echo "# TODO: configure nvchecker source for \"${pkg}\""
     fi