Allow -n / -s with -c

[Synse]

This PR allows -n (newline) or -s (space) with -c (comma).

Before

➜  ~ echo "foo,bar,baz" | qu -cs -q2
"foo","bar","baz"
➜  ~ echo "foo,bar,baz" | qu -cn -q1
'foo','bar','baz'

After

➜  ~ echo "foo,bar,baz" | qu -cs -q2
"foo", "bar", "baz"
➜  ~ echo "foo,bar,baz" | qu -cn -q1
'foo',
'bar',
'baz'
➜  ~ echo "foo,bar,baz" | qu -c -q2  # confirming -n/-s is optional
"foo","bar","baz"