Fix tests to account for negation wrappers

src/spectator/matchers/alternative_value.cr

@@ -14,7 +14,7 @@ module Spectator::Matchers
 
     # Returns the correct value based on the negated status.
     def value
-      @negated ? @value1 : @value2
+      @negated ? @value2 : @value1
     end
 
     # Produces a stringified value.

src/spectator/matchers/negatable_prefixed_value.cr

@@ -4,7 +4,7 @@ module Spectator::Matchers
   private class NegatablePrefixedValue(T)
     # Negatable value.
     getter value
-    
+
     # Creates the wrapper.
     def initialize(@positive_prefix : String, @negative_prefix : String, @value : T)
       @negated = false