语法错误：语法错误，意外tLABEL

Question

在向视图添加Syntax Error: syntax error, unexpected tLABEL时，我有一个collection_check_boxes。

= collection_check_boxes :ethnicity, (collection: ['Asian', 'Black', 'Biracial', 'Indian', 'Hispanic/Latin', 'Middle Eastern', 'Native American', 'Pacific Islander', 'White', 'Other']), prompt: 'Ethnicity'

服务器日志：

 syntax error, unexpected tLABEL
..._boxes :ethnicity, (collection: ['Asian', 'Black', 'Biracial...

它指出collection:是问题所在。