Improve some comments

- clarify the examples for the bench command
- typo  in search.cpp

closes https://github.com/official-stockfish/Stockfish/pull/4710

No functional change

src/benchmark.cpp

@@ -100,15 +100,14 @@ namespace Stockfish {
 /// setup_bench() builds a list of UCI commands to be run by bench. There
 /// are five parameters: TT size in MB, number of search threads that
 /// should be used, the limit value spent for each position, a file name
-/// where to look for positions in FEN format, the type of the limit:
-/// depth, perft, nodes and movetime (in millisecs), and evaluation type
-/// mixed (default), classical, NNUE.
+/// where to look for positions in FEN format, and the type of the limit:
+/// depth, perft, nodes and movetime (in milliseconds). Examples:
 ///
-/// bench -> search default positions up to depth 13
-/// bench 64 1 15 -> search default positions up to depth 15 (TT = 64MB)
-/// bench 64 4 5000 current movetime -> search current position with 4 threads for 5 sec
-/// bench 64 1 100000 default nodes -> search default positions for 100K nodes each
-/// bench 16 1 5 default perft -> run a perft 5 on default positions
+/// bench                            : search default positions up to depth 13
+/// bench 64 1 15                    : search default positions up to depth 15 (TT = 64MB)
+/// bench 64 1 100000 default nodes  : search default positions for 100K nodes each
+/// bench 64 4 5000 current movetime : search current position with 4 threads for 5 sec
+/// bench 16 1 5 blah perft          : run a perft 5 on positions in file "blah"
 
 vector<string> setup_bench(const Position& current, istream& is) {
 

src/nnue/evaluate_nnue.cpp

@@ -82,6 +82,7 @@ namespace Stockfish::Eval::NNUE {
 
   }  // namespace Detail
 
+
   // Initialize the evaluation function parameters
   static void initialize() {
 
@@ -187,7 +188,6 @@ namespace Stockfish::Eval::NNUE {
 
     // We manually align the arrays on the stack because with gcc < 9.3
     // overaligning stack variables with alignas() doesn't work correctly.
-
     constexpr uint64_t alignment = CacheLineSize;
 
 #if defined(ALIGNAS_ON_STACK_VARIABLES_BROKEN)
@@ -249,8 +249,9 @@ namespace Stockfish::Eval::NNUE {
   }
 
 
-  // format_cp_aligned_dot() converts a Value into pawns, always keeping two decimals.
+  // format_cp_aligned_dot() converts a Value into pawns, always keeping two decimals
   static void format_cp_aligned_dot(Value v, std::stringstream &stream) {
+  
     const double pawns = std::abs(0.01 * UCI::to_cp(v));
 
     stream << (v < 0 ? '-' : v > 0 ? '+' : ' ')
@@ -263,7 +264,6 @@ namespace Stockfish::Eval::NNUE {
 
   // trace() returns a string with the value of each piece on a board,
   // and a table for (PSQT, Layers) values bucket by bucket.
-
   std::string trace(Position& pos) {
 
     std::stringstream ss;

src/search.cpp

@@ -746,7 +746,7 @@ namespace {
 
     // Set up the improving flag, which is true if current static evaluation is
     // bigger than the previous static evaluation at our turn (if we were in
-    // check at our previous move we look at static evaluaion at move prior to it
+    // check at our previous move we look at static evaluation at move prior to it
     // and if we were in check at move prior to it flag is set to true) and is
     // false otherwise. The improving flag is used in various pruning heuristics.
     improving =   (ss-2)->staticEval != VALUE_NONE ? ss->staticEval > (ss-2)->staticEval