Fixed typo and grammar

worldedit-core/src/main/java/com/sk89q/worldedit/command/tool/brush/GravityBrush.java

@@ -52,7 +52,7 @@ public void build(EditSession editSession, BlockVector3 position, Pattern patter
             for (double z = position.getZ() - size; z <= position.getZ() + size; z++) {
                 /*
                  * Algorithm:
-                 * 1. Find lowest air block in the selection -> $lowestAir = position
+                 * 1. Find the lowest air block in the selection -> $lowestAir = position
                  * 2. Move the first non-air block above it down to $lowestAir
                  * 3. Add 1 to $lowestAir's y-coord.
                  * 4. If more blocks above current position, repeat from 2

worldedit-core/src/main/java/com/sk89q/worldedit/function/operation/DelegateOperation.java

@@ -26,7 +26,7 @@
 import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
- * Executes a delegete operation, but returns to another operation upon
+ * Executes a delegate operation, but returns to another operation upon
  * completing the delegate.
  */
 public class DelegateOperation implements Operation {

worldedit-core/src/main/java/com/sk89q/worldedit/internal/expression/invoke/CompilingVisitor.java

@@ -84,7 +84,7 @@ class CompilingVisitor extends ExpressionBaseVisitor<MethodHandle> {
      * General idea is that we don't need to pass around variables, they're all in ExecutionData.
      * We do need to pass that around, so most MethodHandles will be of the type
      * (ExecutionData)Double, with a few as (ExecutionData,Double)Double where it needs an existing
-     * value passed in. EVERY handle returned from an overriden method must be of the first type.
+     * value passed in. EVERY handle returned from an overridden method must be of the first type.
      */
     private final Functions functions;