Fix tests for GHC 9.0.2

sol/doctest#327

src/Text/Email/QuasiQuotation.hs

@@ -17,9 +17,8 @@ import Text.Email.Validate (validate, localPart, domainPart, unsafeEmailAddress)
 
 -- | A QuasiQuoter for email addresses. 
 --
--- Use it like this:
+-- Use it like this (requires `QuasiQuotes` to be enabled):
 -- 
--- >>> :set -XQuasiQuotes
 -- >>> [email|[email protected]|]
 -- "[email protected]"
 email :: QuasiQuoter

src/Text/Email/Validate.hs

@@ -24,19 +24,14 @@ import Text.Email.Parser
     , toByteString
     , unsafeEmailAddress)
 
--- $setup
--- This is required for all examples:
---
--- >>> :set -XOverloadedStrings
-
 -- | Smart constructor for an email address
 emailAddress :: ByteString -> Maybe EmailAddress
 emailAddress = either (const Nothing) Just . validate
 
 -- | Checks that an email is valid and returns a version of it
 --   where comments and whitespace have been removed.
 --
--- Example:
+-- Example (requires `OverloadedStrings` to be enabled):
 --
 -- >>> canonicalizeEmail "spaces. are. [email protected]"
 -- Just "[email protected]"
@@ -51,7 +46,7 @@ isValid = either (const False) (const True) . validate
 -- | If you want to find out *why* a particular string is not
 --   an email address, use this.
 --
--- Examples:
+-- Examples (both require `OverloadedStrings` to be enabled):
 --
 -- >>> validate "[email protected]"
 -- Right "[email protected]"
@@ -60,4 +55,3 @@ isValid = either (const False) (const True) . validate
 -- Left "at sign > @: not enough input"
 validate :: ByteString -> Either String EmailAddress
 validate = parseOnly (addrSpec >>= \r -> endOfInput >> return r)
-

tests/doctests.hs

@@ -4,4 +4,6 @@ main = doctest
     [ "-isrc"
     , "src/Text/Email/QuasiQuotation.hs"
     , "src/Text/Email/Validate.hs"
+    , "-XQuasiQuotes"
+    , "-XOverloadedStrings"
     ]