address feedback

Author: rjernst

distribution/tools/keystore-cli/src/main/java/org/elasticsearch/cli/keystore/AddStringKeyStoreCommand.java

@@ -51,8 +51,10 @@ protected void executeCommand(Terminal terminal, OptionSet options, Environment
         final KeyStoreWrapper keyStore = getKeyStore();
 
         final CheckedFunction<String, char[], IOException> valueSupplier = s -> {
-            String prompt = "";
-            if (options.has(stdinOption) == false) {
+            final String prompt;
+            if (options.has(stdinOption)) {
+                prompt = "";
+            } else {
                 prompt = "Enter value for " + s + ": ";
             }
             return terminal.readSecret(prompt);