Move error message output to another method

src/spectator.cr

@@ -83,10 +83,15 @@ module Spectator
     # But if an exception occurs outside an example,
     # it's likely the fault of the test framework (Spectator).
     # So we display a helpful error that could be reported and return non-zero.
-    puts
-    puts "Encountered an unexpected error in framework"
-    puts ex.message
-    puts ex.backtrace.join("\n")
+    display_error(ex)
     exit(1)
   end
+
+  # Displays an error message.
+  private def self.display_error(error)
+    puts
+    puts "Encountered an unexpected error in framework"
+    puts error.message
+    puts error.backtrace.join("\n")
+  end
 end