* refactor: general good option changes
  sp_deref = remove
  sp_not = remove
  sp_inv = remove
  sp_inside_paren_cast = remove
  mod_remove_duplicate_include = true
  sp_after_semi = add
  sp_after_semi_for = force
  sp_sizeof_paren = remove
  nl_return_expr = remove
  nl_else_brace = remove
  nl_else_if = remove
* refactor: mod_remove_extra_semicolon = true
* refactor: nl_max = 3
* refactor: sp_bool = force
* refactor: sp_compare = force
* refactor: sp_inside_paren = remove
* refactor: sp_paren_paren = remove
* refactor: sp_inside_sparen = remove
* refactor: sp_before_sparen = force
* refactor: sp_sign = remove
* refactor: sp_addr = remove
* refactor: sp_member = remove
* refactor: nl_struct_brace = remove
* refactor: nl_before_if_closing_paren = remove
* refactor: nl_fdef_brace = force
* refactor: sp_paren_comma = force
* refactor: mod_full_brace_do = add

vim.str_utf_{start,end} return the offset from the current position to
the start and end of the current utf-character (nearest codepoint)
respectively.