fix atom feed too

Makefile

@@ -183,14 +183,14 @@ blog/atom.xml: $(ARTICLES)
 		printf '%s ' "$$f"; \
 		git log -n 1 --diff-filter=A --date="format:%s %Y-%m-%dT%H:%M:%SZ" --pretty=format:'%ad %aN%n' -- "$$f"; \
 	done | sort -k2nr | head -n $(BLOG_FEED_MAX) | cut -d" " -f1,3- | while IFS=" " read -r FILE DATE AUTHOR; do \
-		printf '<entry>\n<title type="text">%s</title>\n<link rel="alternate" type="text/html" href="%s"/>\n<id>%s</id>\n<published>%s</published>\n<updated>%s</updated>\n<author><name>%s</name></author>\n<summary type="text">%s</summary>\n</entry>\n' \
+		printf '<entry>\n<title type="text">%s</title>\n<link rel="alternate" type="text/html" href="%s"/>\n<id>%s</id>\n<published>%s</published>\n<updated>%s</updated>\n<author><name>%s</name></author>\n<summary type="html"><![CDATA[%s]]></summary>\n</entry>\n' \
 			"`head -n 1 $$FILE | sed 's/^# //'`" \
 			"$(BLOG_URL_ROOT)`basename $$FILE | sed 's/\.md/\.html/'`" \
 			"$(BLOG_URL_ROOT)`basename $$FILE | sed 's/\.md/\.html/'`" \
 			"$$DATE" \
 			"`git log -n 1 --date="format:%Y-%m-%dT%H:%M:%SZ" --pretty=format:'%ad' -- "$$FILE"`" \
 			"$$AUTHOR" \
-			"`tail -n+3 $$FILE`"; \
+			"`markdown < $$FILE`"; \
 	done >> $@
 	printf '</feed>\n' >> $@