<p></p>
<p><b>@aabadie</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/15731#discussion_r555890492">dist/tools/pr_check/check.sh</a>:</p>
<pre style='color:#555'>> @@ -40,21 +43,20 @@ SQUASH_COMMITS="$(git log $(git merge-base HEAD "${RIOT_MASTER}")...HEAD --prett
                   keyword_filter)"
 
 if [ -n "${SQUASH_COMMITS}" ]; then
-    echo -e "${CERROR}Pull request needs squashing:${CRESET}" 1>&2
-    echo -e "${SQUASH_COMMITS}"
+    if github_annotate_is_on; then
+        echo "${SQUASH_COMMITS}" | while read commit; do
+            github_annotate_warning_no_file \
</pre>
<p>New contributors are supposed to have read the contributors guidelines where there's a note about "only squash when requested by reviewers". If they do that because of it, we just have to point them there and they won't do the "mistake" anymore.</p>

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