Code clean-up

This patch implements some idea by Alain Savard and Mike Whiteley taken from the perpertual renaming/reformatting thread.

This is a pure code cleaning patch (so no change in functionality), but I use it as a pretext to correct the bogus bench number that I introduced in the previous commit.

Bench: 4413383

src/evaluate.cpp

@@ -551,7 +551,6 @@ namespace {
                 score += ThreatByRank * (int)relative_rank(Them, s);
         }
 
-        // Bonus for king attacks on pawns or pieces which are not pawn-defended
         if (weak & attackedBy[Us][KING])
             score += ThreatByKing;
 
@@ -576,7 +575,7 @@ namespace {
     b  = shift<Up>(pos.pieces(Us, PAWN)) & ~pos.pieces();
     b |= shift<Up>(b & TRank3BB) & ~pos.pieces();
 
-    // Keep only the squares which are not completely unsafe
+    // Keep only the squares which are relatively safe
     b &= ~attackedBy[Them][PAWN]
         & (attackedBy[Us][ALL_PIECES] | ~attackedBy[Them][ALL_PIECES]);
 

src/misc.cpp

@@ -224,11 +224,11 @@ void bindThisThread(size_t) {}
 
 #else
 
-/// get_group() retrieves logical processor information using Windows specific
+/// best_group() retrieves logical processor information using Windows specific
 /// API and returns the best group id for the thread with index idx. Original
 /// code from Texel by Peter Österlund.
 
-int get_group(size_t idx) {
+int best_group(size_t idx) {
 
   int threads = 0;
   int nodes = 0;
@@ -299,7 +299,7 @@ int get_group(size_t idx) {
 void bindThisThread(size_t idx) {
 
   // Use only local variables to be thread-safe
-  int group = get_group(idx);
+  int group = best_group(idx);
 
   if (group == -1)
       return;