enable lint prefer_foreach (#12674)
* enable lint prefer_foreach
* fix tests
diff --git a/analysis_options_repo.yaml b/analysis_options_repo.yaml
index 0a50bfc..eacdb1a 100644
--- a/analysis_options_repo.yaml
+++ b/analysis_options_repo.yaml
@@ -113,7 +113,7 @@
# - prefer_expression_function_bodies # conflicts with https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#consider-using--for-short-functions-and-methods
- prefer_final_fields
- prefer_final_locals
- # - prefer_foreach # not yet tested
+ - prefer_foreach
# - prefer_function_declarations_over_variables # not yet tested
- prefer_initializing_formals
# - prefer_interpolation_to_compose_strings # not yet tested