Newline backslash stripped

[kokes]

In read_csv documentation, there is an example:

For example, if comment=’#’, parsing ‘#emptyna,b,cn1,2,3’ with header=0 will result in ‘a,b,c’ being treated as the header.

Newlines have their backslashes stripped, because these examples are not encapsulated by double backticks.

Will submit a PR.