Merge pull request rails#52497 from shouichi/add-run-by-line-range-section-to-contribution-guide

Add a section about running tests by line range in contribution guide

Author: byroot

guides/source/contributing_to_ruby_on_rails.md

@@ -385,6 +385,15 @@ $ cd railties
 $ bin/test test/application/asset_debugging_test.rb:69
 ```
 
+#### For a Specific Line Range
+
+Similar tests are often defined in nearby locations. You can run tests in a specific line range.
+
+```bash
+$ cd railties
+$ bin/test test/application/asset_debugging_test.rb:69-100
+```
+
 #### Running Tests with a Specific Seed
 
 Test execution is randomized with a randomization seed. If you are experiencing random