List field values in separate lines (KSG Cabal 1.3.0 - 4.4). Refs #196.

For all settings in libraries, executables, tests and benchmarks, their
values should be set in a new line.

yampa-test/yampa-test.cabal

@@ -54,7 +54,8 @@ description:
   A detailed explanation of these ideas is included in the ICFP 2017 paper
   <https://dl.acm.org/citation.cfm?id=3110246 Testing and Debugging Functional Reactive Programming>.
 
-extra-source-files:  CHANGELOG
+extra-source-files:
+  CHANGELOG
 
 
 source-repository head
@@ -75,12 +76,16 @@ library
     , normaldistribution
     , QuickCheck
     , Yampa >= 0.13.3 && < 0.14
-  default-language:    Haskell2010
-  hs-source-dirs:      src
+  default-language:
+    Haskell2010
+  hs-source-dirs:
+    src
 
 test-suite yampa-quicheck
-  type:        exitcode-stdio-1.0
-  main-is:     YampaQC.hs
+  type:
+    exitcode-stdio-1.0
+  main-is:
+    YampaQC.hs
   build-depends:
       base < 5
     , Cabal >= 1.19
@@ -90,6 +95,9 @@ test-suite yampa-quicheck
     , tasty-quickcheck
     , Yampa
     , yampa-test
-  default-language:    Haskell2010
-  hs-source-dirs:   tests
-  ghc-options: -Wall
+  default-language:
+    Haskell2010
+  hs-source-dirs:
+    tests
+  ghc-options:
+    -Wall