Simplify Quiet Early Move Penalty

Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 185344 W: 47995 L: 47939 D: 89410
Ptnml(0-2): 527, 21898, 47754, 21978, 515
https://tests.stockfishchess.org/tests/view/682a47536ec7634154f9a3bc

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 101706 W: 26050 L: 25912 D: 49744
Ptnml(0-2): 53, 11056, 28499, 11190, 55
https://tests.stockfishchess.org/tests/view/682a61736ec7634154f9a50e

closes https://github.com/official-stockfish/Stockfish/pull/6072

Bench: 2012032

src/movepick.cpp

@@ -249,7 +249,7 @@ top:
         if (!skipQuiets)
         {
             cur = endBadQuiets = endBadCaptures;
-            endMoves = generate<QUIETS>(pos, cur);
+            endMoves           = generate<QUIETS>(pos, cur);
 
             score<QUIETS>();
             partial_insertion_sort(cur, endMoves, -3560 * depth);
@@ -260,8 +260,7 @@ top:
 
     case GOOD_QUIET :
         if (!skipQuiets && select([&]() {
-                return cur->value > -14000 ? true
-                                           : (*endBadQuiets++ = *cur, false);
+                return cur->value > -14000 ? true : (*endBadQuiets++ = *cur, false);
             }))
             return *(cur - 1);
 

src/search.cpp

@@ -1900,8 +1900,7 @@ void update_all_stats(const Position&      pos,
     // Extra penalty for a quiet early move that was not a TT move in
     // previous ply when it gets refuted.
     if (prevSq != SQ_NONE && ((ss - 1)->moveCount == 1 + (ss - 1)->ttHit) && !pos.captured_piece())
-        update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq,
-                                      -malus * (512 + depth * 16) / 1024);
+        update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq, -malus * 580 / 1024);
 
     // Decrease stats for all non-best capture moves
     for (Move move : capturesSearched)