Fix retrieving sqlite3 expression indexes created by sql annotated with trailing comment

Author: fatkodima

activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb

@@ -21,7 +21,7 @@ def indexes(table_name)
               WHERE name = #{quote(row['name'])} AND type = 'index'
             SQL
 
-            /\bON\b\s*"?(\w+?)"?\s*\((?<expressions>.+?)\)(?:\s*WHERE\b\s*(?<where>.+))?\z/i =~ index_sql
+            /\bON\b\s*"?(\w+?)"?\s*\((?<expressions>.+?)\)(?:\s*WHERE\b\s*(?<where>.+))?(?:\s*\/\*.*\*\/)?\z/i =~ index_sql
 
             columns = exec_query("PRAGMA index_info(#{quote(row['name'])})", "SCHEMA").map do |col|
               col["name"]

activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb

@@ -390,6 +390,14 @@ def test_expression_index
           end
         end
 
+        def test_expression_index_with_trailing_comment
+          with_example_table do
+            @conn.execute "CREATE INDEX expression on ex (number % 10) /* comment */"
+            index = @conn.indexes("ex").find { |idx| idx.name == "expression" }
+            assert_equal "number % 10", index.columns
+          end
+        end
+
         def test_expression_index_with_where
           with_example_table do
             @conn.add_index "ex", "id % 10, max(id, number)", name: "expression", where: "id > 1000"