message: Avoid super imports
  Summary: Use crate::syntax::lexer.
diff: @@ -19,6 +19,7 @@ use crate::syntax::{
  ast::Stmt,
  dialect::Dialect,
  grammar::StarlarkParser,
  + lexer::Lexer,
  parse,
  parser::parse_error_add_span,
  testing::{assert_diagnostics, testcase_files},
  @@ -27,7 +28,7 @@ use gazebo::prelude::*;
  use std::sync::Arc;
  fn unwrap_parse(e: &str) -> String {
  - let lexer = super::lexer::Lexer::new(e, &Dialect::Standard).unwrap();
  + let lexer = Lexer::new(e, &Dialect::Standard).unwrap();
  let mut codemap = codemap::CodeMap::new();
  let filespan = codemap.add_file("<test>".to_owned(), e.to_string()).span;
  match StarlarkParser::new().parse(filespan, &Dialect::Extended, lexer) {
  @@ -43,7 +44,7 @@ fn unwrap_parse(e: &str) -> String {
  }
  fn fails_parse(e: &str, dialect: &Dialect) {
  - let lexer = super::lexer::Lexer::new(e, &Dialect::Standard).unwrap();
  + let lexer = Lexer::new(e, &Dialect::Standard).unwrap();
  let mut codemap = codemap::CodeMap::new();
  let filespan = codemap.add_file("<test>".to_owned(), e.to_string()).span;
  match StarlarkParser::new().parse(filespan, dialect, lexer) {
  @@ -181,7 +182,7 @@ fn(1)
  fail(2)
  "#;
  - let lexer = super::lexer::Lexer::new(content, &Dialect::Standard).unwrap();
  + let lexer = Lexer::new(content, &Dialect::Standard).unwrap();
  let mut codemap = codemap::CodeMap::new();
  let filespan = codemap
  .add_file("<test>".to_owned(), content.to_string())
  