add another default gem..

Gemfile

@@ -71,6 +71,9 @@ group :development do
   # this was commented out in the default build, so doing the same..
   # Add speed badges [https://github.com/MiniProfiler/rack-mini-profiler]
   # gem 'rack-mini-profiler'
+
+  # # Highlight the fine-grained location where an error occurred [https://github.com/ruby/error_highlight]
+  gem "error_highlight", ">= 0.4.0", platforms: [:ruby]
 
   gem 'derailed_benchmarks'
   gem 'letter_opener'

Gemfile.lock

@@ -45,7 +45,7 @@ GEM
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    active_storage_db (1.3.0)
+    active_storage_db (1.3.1)
       activestorage (>= 6.0)
       rails (>= 6.0)
     activejob (7.2.1)
@@ -162,6 +162,7 @@ GEM
       devise (>= 4.6)
     docile (1.4.0)
     drb (2.2.1)
+    error_highlight (0.6.0)
     erubi (1.13.0)
     faraday (2.9.0)
       faraday-net_http (>= 2.0, < 3.2)
@@ -518,6 +519,7 @@ DEPENDENCIES
   derailed_benchmarks
   devise (>= 4.6.2)
   devise_invitable (~> 2.0)
+  error_highlight (>= 0.4.0)
   font-awesome-sass
   foreman
   gabba