v0.15.0

Fixed

• GreymereAdventure reports malformed command input and prompts again instead of exiting
  with an uncaught syntax error, preserving inventory and quest progress.
• writeq/1 and print/1 bracket as Corrigendum 3 requires, so their output reads back in either
  mode. An atom that is an operator stands bare as an argument or list element ([:-,-],
  [',']) and is bracketed as an operand ((-)-(-), (*)=(*)). A prefix - brackets a
  non-negative number or an infix or postfix operand: - (1) and - (1^2), which were written
  - 1 and - 1^2. A left operand is bracketed where its operator would take the next one as its
  operand ((fy 1)yf), , and | are bare as operators, '/*' is quoted, and adjacent quoted
  names and a 0 before a quoted name are spaced apart (' op' '1', 0 'f ').
• The reader reads 0''1 as 0 '' 1, and 0' before a line continuation as 0 followed by a
  quoted atom, since no character code follows; 0xor 2, 0bop 2, and 0o8 as 0 followed by a
  name; and [ ](X) as a compound whose functor is []. These were syntax errors.
• The \d and \o escapes are syntax errors in both modes, as in ISO and SWI-Prolog; before,
  number_chars(N, "0'\\o0\\") answered 0. Octal is written \101\.

Changed

• GreymereAdventure now explores seventeen rooms with a bell puzzle, an optional prisoner
  rescue, herbal crafting, a peaceful knight encounter, and a charged boss attack with guarding.
  A quest journal, exploration map, new illustrations, and two scripted winning routes accompany
  the expanded story and its choice-dependent endings.
• Fused direct IL uses clause chains for unbound first arguments, avoiding indexed retry overhead.
  The alternate entries share existing head blocks; bound calls retain first-argument indexing.
• Direct IL predicates use first-argument clause indexing, preserving solution order while
  skipping incompatible heads and avoiding a choice point when only one clause can match.
  Installation remains compatible with earlier IL images.
• The direct IL compiler groups straight-line operations into fewer methods, reducing dispatch
  overhead and generated assembly size. Calls, wake-up checks, and control-flow targets preserve
  their existing resumption behavior.
• +1 reads as +(1) in both modes, as Corrigendum 2 specifies and SWI-Prolog reads it, rather
  than as the integer 1.
• StrictIso reads as the standard does where it and SWI-Prolog disagree: - 1, '-'1, and
  - /* c */ 1 are the integer −1; an atom that is an operator needs brackets to be an operand, so
  X = - is a syntax error there; and a back quoted string is a syntax error. \e is an escape
  only in Modern, which keeps SWI-Prolog's reading of all of these.