Typo doc in word "exceptoinal" (PegaSysEng#1767)

* Typo doc in word "exceptoinal"

* also remaining as a typo

ethereum/core/src/main/java/tech/pegasys/pantheon/ethereum/vm/MessageFrame.java

@@ -132,7 +132,7 @@ public class MessageFrame {
    * <h3>Message Execution Failed ({@link #COMPLETED_FAILED})</h3>
    *
    * <p>The message execution failed to execute successfully; most likely due to encountering an
-   * exceptoinal halting condition. At this point the message frame is finalized and the parent is
+   * exceptional halting condition. At this point the message frame is finalized and the parent is
    * notified.
    *
    * <h3>Message Execution Completed Successfully ({@link #COMPLETED_SUCCESS})</h3>
@@ -309,7 +309,7 @@ public void setPC(final int pc) {
     this.pc = pc;
   }
 
-  /** Deducts the remainging gas. */
+  /** Deducts the remaining gas. */
   public void clearGasRemaining() {
     this.gasRemaining = Gas.ZERO;
   }
@@ -344,7 +344,7 @@ public void incrementRemainingGas(final Gas amount) {
   /**
    * Set the amount of remaining gas.
    *
-   * @param amount The amount of remainging gas
+   * @param amount The amount of remaining gas
    */
   public void setGasRemaining(final Gas amount) {
     this.gasRemaining = amount;