Correctly capture columns that have a multibyte comment

Fixes #836.

lib/annotate/annotate_models.rb

@@ -433,7 +433,7 @@ def annotate_one_file(file_name, info_block, position, options = {})
       old_header = old_content.match(header_pattern).to_s
       new_header = info_block.match(header_pattern).to_s
 
-      column_pattern = /^#[\t ]+[\w\*\.`]+[\t ]+.+$/
+      column_pattern = /^#[\t ]+[^\t ]+[\t ]+.+$/
       old_columns = old_header && old_header.scan(column_pattern).sort
       new_columns = new_header && new_header.scan(column_pattern).sort
 

spec/lib/annotate/annotate_models_spec.rb

@@ -2922,6 +2922,34 @@ def annotate_one_file(options = {})
           expect(File.read(@model_file_name)).to eq("#{@schema_info}#{@file_content}")
         end
       end
+
+      context 'of multibyte comments' do
+        before do
+          klass = mock_class(:users,
+                             :id,
+                             [
+                               mock_column(:id, :integer, comment: 'ID'),
+                             ],
+                             [],
+                             [])
+          @schema_info = AnnotateModels.get_schema_info(klass, '== Schema Info', with_comment: true)
+          annotate_one_file
+        end
+
+        it 'should update columns' do
+          klass = mock_class(:users,
+                             :id,
+                             [
+                               mock_column(:id, :integer, comment: 'ID'),
+                               mock_column(:active, :boolean, limit: 1, comment: 'ＡＣＴＩＶＥ'),
+                             ],
+                             [],
+                             [])
+          @schema_info = AnnotateModels.get_schema_info(klass, '== Schema Info', with_comment: true)
+          annotate_one_file
+          expect(File.read(@model_file_name)).to eq("#{@schema_info}#{@file_content}")
+        end
+      end
     end
 
     describe 'with existing annotation => :before' do