fix typo in error message (#2292)

Author: joelhawksley

lib/view_component/base.rb

@@ -251,7 +251,7 @@ def method_missing(method_name, *args) # rubocop:disable Style/MissingRespondToM
         raise e, <<~MESSAGE.chomp if view_context && e.is_a?(NameError) && helpers.respond_to?(method_name)
           #{e.message}
 
-          You may be trying to call a method provided as a view helper. Did you mean `helpers.#{method_name}'?
+          You may be trying to call a method provided as a view helper. Did you mean `helpers.#{method_name}`?
         MESSAGE
 
         raise

test/sandbox/test/base_test.rb

@@ -122,7 +122,7 @@ def test_no_method_error_does_not_reference_helper_if_view_context_not_present
     exception_message_regex = Regexp.new <<~MESSAGE.chomp, Regexp::MULTILINE
       undefined method `current_user' for .*
 
-      You may be trying to call a method provided as a view helper. Did you mean `helpers.current_user'?
+      You may be trying to call a method provided as a view helper. Did you mean `helpers.current_user`?
     MESSAGE
     assert !exception_message_regex.match?(exception.message)
   end
@@ -135,15 +135,15 @@ def current_user
       end
     }
     exception = assert_raises(NameError) { ReferencesMethodOnHelpersComponent.new.render_in(view_context) }
-    exception_advice = "You may be trying to call a method provided as a view helper. Did you mean `helpers.current_user'?"
+    exception_advice = "You may be trying to call a method provided as a view helper. Did you mean `helpers.current_user`?"
     assert exception.message.include?(exception_advice)
   end
 
   def test_no_method_error_does_not_reference_missing_helper
     view_context = ActionController::Base.new.view_context
     exception = assert_raises(NameError) { ReferencesMethodOnHelpersComponent.new.render_in(view_context) }
     exception_message_regex = Regexp.new <<~MESSAGE.chomp
-      You may be trying to call a method provided as a view helper\\. Did you mean `helpers.current_user'\\?$
+      You may be trying to call a method provided as a view helper\\. Did you mean `helpers.current_user`\\?$
     MESSAGE
     assert !exception_message_regex.match?(exception.message)
   end