message: Standardise some identifiers
diff: @@ -3,12 +3,12 @@ use std::str::CharIndices;
  use source::BytePos;
  use unicode_xid::UnicodeXID;
  -fn is_ident_start(c: char) -> bool {
  - UnicodeXID::is_xid_start(c) || c == '_'
  +fn is_ident_start(ch: char) -> bool {
  + UnicodeXID::is_xid_start(ch) || ch == '_'
  }
  -fn is_ident_continue(c: char) -> bool {
  - UnicodeXID::is_xid_continue(c) || c == '_'
  +fn is_ident_continue(ch: char) -> bool {
  + UnicodeXID::is_xid_continue(ch) || ch == '_'
  }
  fn is_digit(ch: char) -> bool {
  