+# Test unfolding of multi-line header fields: it should only
+# remove embedded newlines.
+cat >"$MH_TEST_DIR/Mail/inbox/12" <<EOF
+From: Test12 <test12@example.com>
+To: Some User <user@example.com>
+Date: Fri, 29 Sep 2006 00:00:00
+Message-Id: 12@test.nmh
+Subject: multi-line
+ header field
+
+This is message number 12
+EOF
+
+echo 12 >"$expected"
+
+pick -subject 'multi-line header field' 12 >"$actual" 2>&1
+check "$expected" "$actual"
+