Merge pull request rails#49666 from skipkayhil/hm-fix-error-highlight-spacing

Fix extra blank line when no error_highlight

Author: jonathanhefner

railties/lib/rails/generators/rails/app/templates/Gemfile.tt

@@ -50,8 +50,8 @@ group :development do
 <%- end -%>
   # Speed up commands on slow machines / big apps [https://github.com/rails/spring]
   # gem "spring"
-
 <%- if RUBY_VERSION >= "3.1" && RUBY_VERSION < "3.2" -%>
+
   gem "error_highlight", ">= 0.4.0", platforms: [:ruby]
 <%- end -%>
 end