Fix makefile syntax errors.

I think this got introduced during some rebases ;__;.

makefile

@@ -18,9 +18,9 @@ setup_subs :
 
 update_default_schema :
 	@echo "Making sure the default-schema.json file is up to date"
-	python -c "import requests;/
+	python -c "import requests;\
                from requests.compat import json as _json;\
-               response = requests.get('https://api.plot.ly/v2/plot-schema?sha1';/
+               response = requests.get('https://api.plot.ly/v2/plot-schema?sha1');\
                f = open('plotly/package_data/default-schema.json', 'w');\
                _json.dump(response.json()['schema'], f, indent=4,\
                           sort_keys=True, separators=(',', ': '));\