Failing test for haskell#3004.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Cabal/Cabal.cabal

@@ -86,6 +86,9 @@ extra-source-files:
   tests/PackageTests/Haddock/NoCPP.hs
   tests/PackageTests/Haddock/Simple.hs
   tests/PackageTests/Haddock/my.cabal
+  tests/PackageTests/HaddockNewline/A.hs
+  tests/PackageTests/HaddockNewline/HaddockNewline.cabal
+  tests/PackageTests/HaddockNewline/Setup.hs
   tests/PackageTests/OrderFlags/Foo.hs
   tests/PackageTests/OrderFlags/my.cabal
   tests/PackageTests/PathsModule/Executable/Main.hs

Cabal/tests/PackageTests/HaddockNewline/A.hs

@@ -0,0 +1 @@
+module A where

Cabal/tests/PackageTests/HaddockNewline/ChangeLog.md

@@ -0,0 +1,5 @@
+# Revision history for HaddockNewline
+
+## 0.1.0.0  -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.

Cabal/tests/PackageTests/HaddockNewline/HaddockNewline.cabal

@@ -0,0 +1,20 @@
+name:                HaddockNewline
+version:             0.1.0.0
+synopsis:            This has a
+                     newline yo.
+-- description:         
+license:             BSD3
+license-file:        LICENSE
+author:              Edward Z. Yang
+maintainer:          ezyang@cs.stanford.edu
+build-type:          Simple
+extra-source-files:  ChangeLog.md
+cabal-version:       >=1.10
+
+library
+  exposed-modules:     A
+  -- other-modules:       
+  -- other-extensions:    
+  build-depends:       base
+  -- hs-source-dirs:      
+  default-language:    Haskell2010

Cabal/tests/PackageTests/HaddockNewline/LICENSE

@@ -0,0 +1,30 @@
+Copyright (c) 2015, Edward Z. Yang
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Edward Z. Yang nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Cabal/tests/PackageTests/HaddockNewline/Setup.hs

@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain

Cabal/tests/PackageTests/Tests.hs

@@ -178,6 +178,11 @@ tests config =
                     ["CPP.html", "Literate.html", "NoCPP.html", "Simple.html"]
       mapM_ (assertFindInFile "For hiding needles.") docFiles
 
+  -- Test that Haddock with a newline in synopsis works correctly, #3004
+  , tc "HaddockNewline" $ do
+        cabal "configure" []
+        cabal "haddock" []
+
   -- Test that Cabal properly orders GHC flags passed to GHC (when
   -- there are multiple ghc-options fields.)
   , tc "OrderFlags" $ cabal_build []