Revert "Prefer Minitest's location for test failures."

This reverts commit 0db310586ac3e15be95d2ef27ff40cfa24c05c10.

Closes #23686.

Conflicts:
	railties/test/application/test_runner_test.rb

It's possible that the `result.location` returned by minitest is outside
the test file itself. For example in the case of mocha. This resulted in
bad rerun snipptets:

```
bin/rails test app/models/deliveries/delivery.rb:103
```

Let's always use the first line of the failed test-case in our rerun
snippet. We can display the line number of the assertion error elsewhere.

2 files changed, 3 insertions, 9 deletions

diff --git a/railties/lib/rails/test_unit/reporter.rb b/railties/lib/rails/test_unit/reporter.rb
index 73b8d7d27b..317726f672 100644
--- a/railties/lib/rails/test_unit/reporter.rb
+++ b/railties/lib/rails/test_unit/reporter.rb
@@ -73,14 +73,8 @@ module Rails
       end
 
       def format_rerun_snippet(result)
-        # Try to extract path to assertion from backtrace.
-        if result.location =~ /\[(.*)\]\z/
-          assertion_path = $1
-        else
-          assertion_path = result.method(result.name).source_location.join(':')
-        end
-
-        "#{self.executable} #{relative_path_for(assertion_path)}"
+        location, line = result.method(result.name).source_location
+        "#{self.executable} #{relative_path_for(location)}:#{line}"
       end
 
       def app_root
diff --git a/railties/test/application/test_runner_test.rb b/railties/test/application/test_runner_test.rb
index 7ecadb60ca..5a6119c483 100644
--- a/railties/test/application/test_runner_test.rb
+++ b/railties/test/application/test_runner_test.rb
@@ -467,7 +467,7 @@ module ApplicationTests
       create_test_file :models, 'post', pass: false
 
       output = run_test_command('test/models/post_test.rb')
-      expect = %r{Running:\n\nPostTest\nF\n\nFailure:\nPostTest#test_truth:\nwups!\n\nbin/rails test test/models/post_test.rb:6\n\n\n\n}
+      expect = %r{Running:\n\nPostTest\nF\n\nFailure:\nPostTest#test_truth:\nwups!\n\nbin/rails test test/models/post_test.rb:4\n\n\n\n}
       assert_match expect, output
     end