Quote package locations with spaces when printing

And extend the project config print/parse tests to cover quoted strings.

cabal-install/Distribution/Client/ProjectConfig/Legacy.hs

@@ -17,6 +17,7 @@ module Distribution.Client.ProjectConfig.Legacy (
 
     -- * Internals, just for tests
     parsePackageLocationTokenQ,
+    renderPackageLocationToken,
   ) where
 
 import Distribution.Client.ProjectConfig.Types
@@ -755,6 +756,8 @@ renderPackageLocationToken s | needsQuoting = show s
     ok n ('{':cs) = ok (n+1) cs
     ok n ('}':cs) = ok (n-1) cs
     ok n (',':cs) = (n > 0) && ok n cs
+    ok _ (c:_)
+      | isSpace c = False
     ok n (_  :cs) = ok n cs
 
 

cabal-install/tests/UnitTests/Distribution/Client/ProjectConfig.hs

@@ -223,7 +223,8 @@ prop_roundtrip_printparse_specific config =
 
 prop_parsePackageLocationTokenQ :: PackageLocationString -> Bool
 prop_parsePackageLocationTokenQ (PackageLocationString str) =
-    case [ x | (x,"") <- Parse.readP_to_S parsePackageLocationTokenQ str ] of
+    case [ x | (x,"") <- Parse.readP_to_S parsePackageLocationTokenQ
+                                         (renderPackageLocationToken str) ] of
       [str'] -> str' == str
       _      -> False
 
@@ -259,8 +260,8 @@ instance Arbitrary PackageLocationString where
   arbitrary =
     PackageLocationString <$>
     oneof
-      [ --show <$> (arbitrary :: Gen String)
-        arbitraryGlobLikeStr
+      [ show . getNonEmpty <$> (arbitrary :: Gen (NonEmptyList String))
+      , arbitraryGlobLikeStr
       , show <$> (arbitrary :: Gen URI)
       ]