Try different method

This should only have ExceptionMatcher's match data types

spec/helpers/matchers_helper.cr

@@ -1,6 +1,5 @@
 # Retrieves a value from the `NamedTuple` returned by `Spectator::Matchers::MatchData#values`.
 def match_data_value(match_data, key)
-  puts typeof(match_data.values)
   match_data.values.fetch(key) { raise "#{key} is missing" }
 end
 
@@ -8,6 +7,15 @@ end
 # from a `Spectator::Matchers::PrefixedValue`
 # in a `NamedTuple` returned by `Spectator::Matchers::MatchData#values`.
 def match_data_prefix(match_data, key)
+  prefix = match_data.values.fetch(key) { raise "#{key} is missing" }
+  if prefix.responds_to?(:value)
+    {to_s: prefix.to_s, value: prefix.value}
+  else
+    {to_s: prefix.to_s, value: prefix}
+  end
+end
+
+def match_data_prefix2(match_data, key)
   puts typeof(match_data.values)
   prefix = match_data.values.fetch(key) { raise "#{key} is missing" }
   if prefix.responds_to?(:value)