docs: add info about ignoring tests folder

Author: incendial

lib/src/analyzers/lint_analyzer/metrics/metrics_factory.dart

@@ -27,10 +27,10 @@ final _implementedMetrics = <String, Metric Function(Map<String, Object>)>{
       SourceLinesOfCodeMetric(config: config),
   WeightOfClassMetric.metricId: (config) => WeightOfClassMetric(config: config),
   // Complex metrics:
-  // Depend on CyclomaticComplexityMetric, HalsteadVolumeMetric and SourceLinesOfCodeMetric metrics
+  // Depends on CyclomaticComplexityMetric, HalsteadVolumeMetric and SourceLinesOfCodeMetric metrics
   MaintainabilityIndexMetric.metricId: (config) =>
       MaintainabilityIndexMetric(config: config),
-  // Depend on all metrics.
+  // Depends on all metrics.
   TechnicalDebtMetric.metricId: (config) => TechnicalDebtMetric(config: config),
 };
 

website/docs/rules/common/avoid-passing-async-when-sync-expected.mdx

@@ -4,6 +4,12 @@ import RuleDetails from '@site/src/components/RuleDetails';
 
 Avoid passing asynchronous function as an argument where a synchronous function is expected.
 
+:::note
+
+For this rule it's recommended to exclude the `test` folder.
+
+:::
+
 ### Example {#example}
 
 **❌ Bad:**

website/docs/rules/common/prefer-match-file-name.mdx

@@ -4,8 +4,12 @@ import RuleDetails from '@site/src/components/RuleDetails';
 
 Warns if the file name does not match the name of the first public class / mixin / extension / enum in the file or a private one if there are no public entries.
 
+:::note
+
 For this rule it's recommended to exclude the `test` folder.
 
+:::
+
 ```yaml
 dart_code_metrics:
   ...