Fix some Javadoc typos.

Reflects signalapp/libsignal-protocol-java@f1a44ed

I'm going to turn the javadocs into C# XML documentation soon.

Author: golf1052

libsignal-protocol-dotnet/fingerprint/Fingerprint.cs

@@ -39,11 +39,11 @@ public DisplayableFingerprint getDisplayableFingerprint()
         }
 
         /**
-         * @return A scannable fingerprint that can be scanned anc compared locally.
+         * @return A scannable fingerprint that can be scanned and compared locally.
          */
         public ScannableFingerprint getScannableFingerprint()
         {
             return scannableFingerprint;
         }
     }
-}
+}

libsignal-protocol-dotnet/fingerprint/NumericFingerprintGenerator.cs

@@ -75,7 +75,7 @@ public Fingerprint createFor(int version,
         }
 
         /// <summary>
-        /// Generate a scannable and displayble fingerprint for logical identities that have multiple physical keys.
+        /// Generate a scannable and displayable fingerprint for logical identities that have multiple physical keys.
         /// 
         /// Do not trust the output of this unless you've been through the device consistency process for the provided
         /// localIdentityKeys.

libsignal-protocol-dotnet/fingerprint/ScannableFingerprint.cs

@@ -60,7 +60,7 @@ public byte[] getSerialized()
          * Compare a scanned QR code with what we expect.
          *
          * @param scannedFingerprintData The scanned data
-         * @return True if matching, otehrwise false.
+         * @return True if matching, otherwise false.
          * @throws FingerprintVersionMismatchException if the scanned fingerprint is the wrong version.
          * @throws FingerprintIdentifierMismatchException if the scanned fingerprint is for the wrong stable identifier.
          */