VIM下Express jade空格问题：expected "indent", but got "newline"

Error: /home/y/my_note/nodejs/myapp/views/index.jade:20
18|           -list=[{name:'zhangsan',age:25,email:'zhangsan@123.com'}]
19|           -each l in list
> 20|           tr
21|               td=l.name
22|               td=l.age
23|               td=l.email

expected "indent", but got "newline"
at Parser.expect (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:175:13)
at Parser.block (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:702:10)
at Parser.parseEach (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:439:23)
at Parser.parseExpr (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:233:21)
at Parser.block (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:707:25)
at Parser.tag (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:816:24)
at Parser.parseTag (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:737:17)
at Parser.parseExpr (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:211:21)
at Parser.block (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:707:25)
at Parser.tag (/home/y/my_note/nodejs/myapp/node_modules/jade/lib/parser.js:816:24)

17       tbody
18           -list=[{name:'zhangsan',age:25,email:'zhangsan@123.com'}]
19           -each l in list
20             tr
21               td= l.name
22               td= l.age
23               td= l.email