error: whitespace control is not allowed on `extends`
 --> <source attribute>:1:2
       "- extends \"whatever.html\" %}"
 --> tests/ui/extends.rs:5:14
  |
5 |     source = r#"{%- extends "whatever.html" %}"#,
  |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: whitespace control is not allowed on `extends`
 --> <source attribute>:1:2
       " extends \"whatever.html\" -%}"
  --> tests/ui/extends.rs:12:14
   |
12 |     source = r#"{% extends "whatever.html" -%}"#,
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^