Also:
   * FIGNORE ignore patterns now start to exempt more-specific requested
     patterns: for example, if a .* is an ignore pattern @.* will still
     return all files beginning with a period. If *~ is an ignore pattern,
     then @*c~ will return all files ending with c~, but if *c~ is an ignore
     pattern, then @*~ will return all files ending with ~ that don't end
     with c~.

   * .binary is necessary to add binaries to the executable map/hash table

   * .error to write to stderror

   * .rm_executable to remove something from the hash table rather than
     defining a function without a body

   * .test_in like the "in" test in awk

   * .which_path has special handling for ./ and ../ at the beginning of the
     executable name

   * Polish Arithmetic, including a - function for subtraction and a
     / function for division

   * Numerical variables (while they last) don't ignore trailing
     non-numerical characters (e.g. $1a is different from $1)

   * More exceptions can be thrown in parallel

   * And, of course, it isn't a significant commit if there isn't a tweak
     to the internals of if-else handling. This time it was handling
     if-else calls within the condition, (specifically in an autofunction
     implicitly called by a condition).