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[flutter_tools] Add use_null_aware_elements lint rule and fix new warnings - #193215
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use_null_aware_elements lint ruleuse_null_aware_elements lint rule and fix new warnings
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This pull request enables the "use_null_aware_elements" linter rule in analysis_options.yaml and updates map literals in build_info.dart, config.dart, and web_template.dart to use null-aware element syntax instead of conditional if statements. There are no review comments, so no feedback is provided.
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This change adds
use_null_aware_elementslint rule and fixes new warningsPre-launch Checklist
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