Consistent case in CLI option descriptions (#49635)

This commit improves the casing of messages in the CLI help descriptions.

Author: orhantoy

libs/cli/src/main/java/org/elasticsearch/cli/Command.java

@@ -43,10 +43,10 @@ public abstract class Command implements Closeable {
     /** The option parser for this command. */
     protected final OptionParser parser = new OptionParser();
 
-    private final OptionSpec<Void> helpOption = parser.acceptsAll(Arrays.asList("h", "help"), "show help").forHelp();
-    private final OptionSpec<Void> silentOption = parser.acceptsAll(Arrays.asList("s", "silent"), "show minimal output");
+    private final OptionSpec<Void> helpOption = parser.acceptsAll(Arrays.asList("h", "help"), "Show help").forHelp();
+    private final OptionSpec<Void> silentOption = parser.acceptsAll(Arrays.asList("s", "silent"), "Show minimal output");
     private final OptionSpec<Void> verboseOption =
-        parser.acceptsAll(Arrays.asList("v", "verbose"), "show verbose output").availableUnless(silentOption);
+        parser.acceptsAll(Arrays.asList("v", "verbose"), "Show verbose output").availableUnless(silentOption);
 
     /**
      * Construct the command with the specified command description and runnable to execute before main is invoked.

server/src/main/java/org/elasticsearch/bootstrap/Elasticsearch.java

@@ -52,9 +52,9 @@ class Elasticsearch extends EnvironmentAwareCommand {
 
     // visible for testing
     Elasticsearch() {
-        super("starts elasticsearch", () -> {}); // we configure logging later so we override the base class from configuring logging
+        super("Starts Elasticsearch", () -> {}); // we configure logging later so we override the base class from configuring logging
         versionOption = parser.acceptsAll(Arrays.asList("V", "version"),
-            "Prints elasticsearch version information and exits");
+            "Prints Elasticsearch version information and exits");
         daemonizeOption = parser.acceptsAll(Arrays.asList("d", "daemonize"),
             "Starts Elasticsearch in the background")
             .availableUnless(versionOption);