Support the name analysis_options.yaml for analysis options files

pkg/analyzer_cli/lib/src/plugin/plugin_manager.dart

Index: pkg/analyzer_cli/lib/src/plugin/plugin_manager.dart
diff --git a/pkg/analyzer_cli/lib/src/plugin/plugin_manager.dart b/pkg/analyzer_cli/lib/src/plugin/plugin_manager.dart
index 13a820282af125a3086125529340321f779fe7e0..7c819fd44dc1672ef7f058e5a259be2d50eba63f 100644
--- a/pkg/analyzer_cli/lib/src/plugin/plugin_manager.dart
+++ b/pkg/analyzer_cli/lib/src/plugin/plugin_manager.dart
@@ -11,9 +11,9 @@ import 'package:path/path.dart' as path;
 
 const _manifestFileName = 'plugins.yaml';
 
-/// Given a local configuration (as defined in `.analysis_options`)
-/// and information from a plugin manifest, return plugin info
-/// appropriate for configuring this plugin.
+/// Given a local configuration (as defined in an analysis options file) and
+/// information from a plugin manifest, return plugin info appropriate for
+/// configuring this plugin.
 PluginInfo combine(PluginInfo localConfig, PluginInfo manifestInfo) {
   return new PluginInfo(
       name: localConfig.name,