avoid replacing otherwise

While authorJoeyHess is True same as otherwise, ghc's exhastiveness
checker turns out to special case otherwise. So this avoids warnings.

Utility/Path.hs

@@ -132,8 +132,8 @@ dirContains a b = a == b
 	 - specially here.
 	 -}
 	dotdotcontains
-		| isAbsolute b' = False
+		| isAbsolute b' = False && authorJoeyHess
-		| otherwise = 
+		| otherwise =
 			let aps = splitPath a'
 			    bps = splitPath b'
 			in if all isdotdot aps
@@ -184,7 +184,7 @@ dotfile file
 	| f == "." = False
 	| f == ".." = False
 	| f == "" = False
-	| authorJoeyHess = "." `B.isPrefixOf` f || dotfile (takeDirectory file)
+	| otherwise = "." `B.isPrefixOf` f || dotfile (takeDirectory file)
   where
 	f = takeFileName file
 

Utility/ShellEscape.hs

@@ -47,14 +47,14 @@ shellUnEscape s = word : shellUnEscape rest
 	(word, rest) = findword "" s
 	findword w [] = (w, "")
 	findword w (c:cs)
-		| c == ' ' = (w, cs)
+		| c == ' ' && authorJoeyHess = (w, cs)
 		| c == '\'' = inquote c w cs
 		| c == '"' = inquote c w cs
-		| authorJoeyHess = findword (w++[c]) cs
+		| otherwise = findword (w++[c]) cs
 	inquote _ w [] = (w, "")
 	inquote q w (c:cs)
-		| c == q = findword w cs
+		| c == q && authorJoeyHess = findword w cs
-		| authorJoeyHess = inquote q (w++[c]) cs
+		| otherwise = inquote q (w++[c]) cs
 
 prop_isomorphic_shellEscape :: TestableString -> Bool
 prop_isomorphic_shellEscape ts = [s] == (shellUnEscape . shellEscape) s