fix typos

src/apiutil.h

@@ -237,7 +237,7 @@ inline Disambiguation disambiguation_level(const Position& pos, Move m, Notation
             return SQUARE_DISAMBIGUATION;
     }
 
-    // A disambiguation occurs if we have more then one piece of type 'pt'
+    // A disambiguation occurs if we have more than one piece of type 'pt'
     // that can reach 'to' with a legal move.
     Bitboard b = pos.pieces(us, pt) ^ from;
     Bitboard others = 0;

src/misc.h

@@ -153,7 +153,7 @@ class ValueList {
 
 // This logger allows printing many parts in a region atomically
 // but doesn't block the threads trying to append to other regions.
-// Instead if some region tries to pring while other region holds
+// Instead if some region tries to print while other region holds
 // the lock the messages are queued to be printed as soon as the
 // current region releases the lock.
 struct SynchronizedRegionLogger

src/parser.cpp

@@ -509,7 +509,7 @@ Variant* VariantParser<DoCheck>::parse(Variant* v) {
     // Report invalid options
     if (DoCheck)
     {
-        const std::set<std::string>& parsedKeys = config.get_comsumed_keys();
+        const std::set<std::string>& parsedKeys = config.get_consumed_keys();
         for (const auto& it : config)
             if (parsedKeys.find(it.first) == parsedKeys.end())
                 std::cerr << "Invalid option: " << it.first << std::endl;

src/parser.h

@@ -34,7 +34,7 @@ class Config : public std::map<std::string, std::string> {
         consumedKeys.insert(s);
         return std::map<std::string, std::string>::find(s);
     }
-    const std::set<std::string>& get_comsumed_keys() {
+    const std::set<std::string>& get_consumed_keys() {
         return consumedKeys;
     }
 private:

src/position.cpp

@@ -2570,7 +2570,7 @@ bool Position::see_ge(Move m, Value threshold) const {
   return bool(res);
 }
 
-/// Position::is_optinal_game_end() tests whether the position may end the game by
+/// Position::is_optional_game_end() tests whether the position may end the game by
 /// 50-move rule, by repetition, or a variant rule that allows a player to claim a game result.
 
 bool Position::is_optional_game_end(Value& result, int ply, int countStarted) const {