fixes

Author: JasperGeurtz

src/main/java/bwapi/Player.java

@@ -81,7 +81,7 @@ public List<Unit> getUnits() {
 
     /**
      * Retrieves the race of the player. This allows you to change strategies
-     * against different races, or generalize some commands for yourself().
+     * against different races, or generalize some commands for yourself.
      *
      * @return The Race that the player is using.
      * Returns {@link Race#Unknown} if the player chose {@link Race#Random} when the game started and they

src/main/java/bwapi/Unit.java

@@ -64,7 +64,7 @@ public class Unit implements Comparable<Unit> {
     private UnitSelf self = null;
     UnitSelf self() {
         if (self == null) {
-            self= new UnitSelf();
+            self = new UnitSelf();
         }
         return self;
     }
@@ -4294,13 +4294,13 @@ public boolean canUpgrade(UpgradeType type, boolean checkCanIssueCommandType) {
             return false;
         }
 
-        if (self.hasUnitTypeRequirement(type.whatUpgrades())) {
+        if (!self.hasUnitTypeRequirement(type.whatUpgrades())) {
             return false;
         }
 
         final int nextLvl = self.getUpgradeLevel(type) + 1;
 
-        if (self.hasUnitTypeRequirement(type.whatsRequired(nextLvl))) {
+        if (!self.hasUnitTypeRequirement(type.whatsRequired(nextLvl))) {
             return false;
         }