- Fix loading of l3str-format
  - Fix handling of \iow_newline: in \iow_wrap:nnnN
  - \cs_generate_variant:Nn now warns on incorrect variant
  - Better recovery by \dim_set:Nn, etc., if passed
    skip expressions
  - Better handling of global/local consistency in variable
  - String mappings now include space characters
  - Revise l3doc to no longer require "[aux]" (deprecated) or
    "[int]" in code mark up: "[int]" is retained for cases where
    auto-detection of internals is not possible
  - Deprecate \token_new:Nn
  - Documentation improvements