Makefile; rule all does not fully work

Makefile

+download:
+	rm -rf pdfs/; mkdir pdfs/
+	python dl_pdfs.py
+parse:
+	rm -rf txts/; mkdir txts/
+	python parse_pdfs.py
+
+all: | download parse
+	echo "done."
+clean:
+	rm -f *.log