shithub: puzzles

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Fix an inaccurate comment.

latin_solver_diff_set takes a boolean input parameter to indicate
whether the 'Extreme'-level variant of set elimination is permitted.
But it's commented in the header file as having a boolean _output_
parameter which it sets if it _ended up_ using that variant. Probably
the latter was how it worked in an early draft, and I changed my mind
later without changing the comment.

--- a/latin.h

+++ b/latin.h

@@ -78,8 +78,8 @@

 /* Looped positional elimination */

 int latin_solver_diff_simple(struct latin_solver *solver);

-/* Looped set elimination; *extreme is set if it used

- * the more difficult single-number elimination. */

+/* Looped set elimination; extreme permits use of the more difficult

+ * single-number elimination. */

 int latin_solver_diff_set(struct latin_solver *solver,

                           struct latin_solver_scratch *scratch,

                           int extreme);