Fix typos

Author: jasontedor

distribution/tools/plugin-cli/src/main/java/org/elasticsearch/plugins/InstallPluginCommand.java

@@ -425,7 +425,7 @@ private InputStream urlOpenStream(final URL url) throws IOException {
     }
 
     /**
-     * Downlaods a ZIP from the URL. This method also validates the downloaded plugin ZIP via the following means:
+     * Downloads a ZIP from the URL. This method also validates the downloaded plugin ZIP via the following means:
      * <ul>
      * <li>
      * For an official plugin we download the SHA-512 checksum and validate the integrity of the downloaded ZIP. We also download the

distribution/tools/plugin-cli/src/test/java/org/elasticsearch/plugins/InstallPluginCommandTests.java

@@ -1102,7 +1102,7 @@ public void testPublicKeyIdMismatchToExpectedPublicKeyId() throws Exception {
                 "https://artifacts.elastic.co/downloads/elasticsearch-plugins/analysis-icu/" + icu + "-" + Version.CURRENT + ".zip";
         final MessageDigest digest = MessageDigest.getInstance("SHA-512");
         /*
-         * To setup a situation where the expected public key ID does not match the public key ID used for singing, we generate a new public
+         * To setup a situation where the expected public key ID does not match the public key ID used for signing, we generate a new public
          * key at the moment of signing (see the signature invocation). Note that this key will not match the key that we push down to the
          * install plugin command.
          */