fixed cd

Makefile

@@ -69,11 +69,7 @@ deploy: all
 	cp practical_work/*.html phys/practical_work
 	cp practical_work/*.pdf phys/practical_work
 	ls -ltr
-	cd practical_work/
-	tar --version
-	ls -ltr
-	tar czvf tp_vec2.tar.gz tp_vec2/
-	cp tp_vec2.tar.gz ../phys/practical_work
+	cd practical_work/ && tar cvf tp_vec2.tar.gz tp_vec2/ && cp tp_vec2.tar.gz ../phys/practical_work
 
 clean:
 	rm -f *.html *.pdf $(MARKDOWN) $(PDF) $(TEX) $(HTML)