Fix Issue 38777 When looking through for a closing bracket in the loop condition, adds them to expecteds. https://github.com/rust-lang/rust/issues/38777
The syntax
crate contains those things concerned purely with syntax
– that is, the AST ("abstract syntax tree"), parser, pretty-printer,
lexer, macro expander, and utilities for traversing ASTs.
For more information about how these things work in rustc, see the rustc guide: