Abstract part of translation string

- Allows string to change without breaking test
- Makes test expectation less magical

config/locales/en.txt

@@ -827,6 +827,7 @@
   removed_from_project: Removed [object] from "[project]".
   select_file: Select file...
   no_file_selected: No file selected.
+  SEE_MESSAGE_BELOW: See message below.
   "YES": "Yes"
   "NO": "No"
   "yes": "yes"
@@ -1642,13 +1643,13 @@
   form_observations_collection_number_help: Enter the collector's full name and their record identifier.  The identifier can be anything.  It's whatever you use to keep track of your specimens, and it is typically written on the specimen label.  This is most commonly a sequential number starting at 1 for your first specimen, and working up over your life time.  Another common format is a year or date along with a collection number for that date, e.g., "17-034".  But it can be anything you like, including letters and punctuation.
   form_observations_herbarium_record_help: If you've sent a specimen to a fungarium, you can enter that here, along with their accession number if you know it.  Otherwise let it default to your personal fungarium and leave the accession number blank.
 
-  form_observations_there_is_a_problem_with_projects: This observation violates the constraints of one or more selected projects. "+See message below.+":#project_messages
+  form_observations_there_is_a_problem_with_projects: This observation violates the constraints of one or more selected projects. "+[:SEE_MESSAGE_BELOW]+":#project_messages
   form_observations_projects_out_of_range: The observation date ([date]) or location ([place_name]) is outside the range of these checked project(s)
   form_observations_projects_out_of_range_help: "Either:\n- Uncheck out-of-range projects;\n- Change the observation date or location if it is incorrect; or\n- (undesirably) Check [:form_observations_projects_ignore_project_constraints] to ignore the project constraints.\nThen click [button_name]."
   form_observations_projects_ignore_project_constraints: Ignore Project Constraints
 
-  form_observations_there_is_a_problem_with_location: There is a problem with the location. "+See message below.+":#location_messages
-  form_observations_there_is_a_problem_with_name: There is a problem with the name. "+See message below.+":#name_messages
+  form_observations_there_is_a_problem_with_location: There is a problem with the location. "+[:SEE_MESSAGE_BELOW]+":#location_messages
+  form_observations_there_is_a_problem_with_name: There is a problem with the name. "+[:SEE_MESSAGE_BELOW]+":#name_messages
 
   # observations/_form_species_list
   form_species_lists_title: Title

test/integration/capybara/namings_integration_test.rb

@@ -51,7 +51,7 @@ def test_proposing_names
     assert_flash_text(:form_naming_what_missing.l, session: namer_session)
     namer_session.
       # see https://github.com/MushroomObserver/mushroom-observer/issues/1796
-      assert_no_selector("#flash_notices", text: "See message below")
+      assert_no_selector("#flash_notices", text: :SEE_MESSAGE_BELOW.l)
 
     namer_session.within("#obs_#{obs.id}_naming_form") do |form|
       form.fill_in("naming_name", with: text_name)