Assorted grammar fixes

Mainly from Lyudmil Antonov and
one from Henri Wiechers and Louis Zulli.

No functional change.

src/benchmark.cpp

@@ -69,7 +69,7 @@ static const char* Defaults[] = {
 /// of positions for a given limit each. There are five parameters: the
 /// transposition table size, the number of search threads that should
 /// be used, the limit value spent for each position (optional, default is
-/// depth 12), an optional file name where to look for positions in FEN
+/// depth 13), an optional file name where to look for positions in FEN
 /// format (defaults are the positions defined above) and the type of the
 /// limit value: depth (default), time in secs or number of nodes.
 

src/bitbase.cpp

@@ -33,7 +33,7 @@ namespace {
 
   // A KPK bitbase index is an integer in [0, IndexMax] range
   //
-  // Information is mapped in a way that minimizes number of iterations:
+  // Information is mapped in a way that minimizes the number of iterations:
   //
   // bit  0- 5: white king square (from SQ_A1 to SQ_H8)
   // bit  6-11: black king square (from SQ_A1 to SQ_H8)

src/bitboard.h

@@ -177,7 +177,7 @@ inline Bitboard in_front_bb(Color c, Rank r) {
 
 /// between_bb() returns a bitboard representing all squares between two squares.
 /// For instance, between_bb(SQ_C4, SQ_F7) returns a bitboard with the bits for
-/// square d5 and e6 set.  If s1 and s2 are not on the same line, file or diagonal,
+/// square d5 and e6 set.  If s1 and s2 are not on the same rank, file or diagonal,
 /// 0 is returned.
 
 inline Bitboard between_bb(Square s1, Square s2) {

src/book.cpp

@@ -372,7 +372,7 @@ template<> PolyglotBook& PolyglotBook::operator>>(Entry& e) {
 
 
 /// open() tries to open a book file with the given name after closing any
-/// exsisting one.
+/// existing one.
 
 bool PolyglotBook::open(const char* fName) {
 

src/endgame.cpp

@@ -817,7 +817,7 @@ ScaleFactor Endgame<KBPKN>::operator()(const Position& pos) const {
 
 
 /// KNP vs K. There is a single rule: if the pawn is a rook pawn on the 7th rank
-/// and the defending king prevents the pawn from advancing the position is drawn.
+/// and the defending king prevents the pawn from advancing, the position is drawn.
 template<>
 ScaleFactor Endgame<KNPK>::operator()(const Position& pos) const {
 

src/position.cpp

@@ -614,7 +614,7 @@ bool Position::pseudo_legal(const Move m) const {
 }
 
 
-/// Position::move_gives_check() tests whether a pseudo-legal move gives a check
+/// Position::gives_check() tests whether a pseudo-legal move gives a check
 
 bool Position::gives_check(Move m, const CheckInfo& ci) const {
 

src/timeman.cpp

@@ -66,7 +66,7 @@ void TimeManager::pv_instability(double bestMoveChanges) {
 
 void TimeManager::init(const Search::LimitsType& limits, int currentPly, Color us)
 {
-  /* We support four different kind of time controls:
+  /* We support four different kinds of time controls:
 
       increment == 0 && movesToGo == 0 means: x basetime  [sudden death!]
       increment == 0 && movesToGo != 0 means: x moves in y minutes

src/ucioption.cpp

@@ -113,7 +113,7 @@ std::ostream& operator<<(std::ostream& os, const OptionsMap& om) {
 }
 
 
-/// Option c'tors and conversion operators
+/// Option class constructors and conversion operators
 
 Option::Option(const char* v, Fn* f) : type("string"), min(0), max(0), idx(Options.size()), on_change(f)
 { defaultValue = currentValue = v; }