Added whitespace before backslash in cURL command
Added whitespace before backslash in cURL command

Ignoring a space before backslash "\" makes cURL read the parameters like this

    -d event='sent'-d event='opened' -d skip=1 -d limit=2

which throws the error __curl: (6) Couldn't resolve host 'event=opened'__
kaustavha/documentation,stevenmc/documentation,kaustavha/documentation,xjzhou/documentation,mailgun/documentation,mailgun/documentation,stevenmc/documentation,xjzhou/documentation,kaustavha/documentation,mailgun/documentation,xjzhou/documentation,stevenmc/documentation