While sending cookie with special symbols or spaces, aiohttp adds unnecessary quotes around cookie value.

This only occurs when cookies are added to session manually. ClientSession(cookies={..}) or when updating existing session.

• Example what cookie should look like:

User-Agent: User-Agent
Accept: */*
Accept-Encoding: gzip, deflate
Host: httpbin.org
Cookie: cookie_name=cookie_value

• Example when unnecessary quotes are added:

User-Agent: User-Agent
Accept: */*
Accept-Encoding: gzip, deflate
Host: httpbin.org
Cookie: cookie_name="cookie_ value"

This creates problem for server side to read cookies correctly.