Allow adding multiple examples for config help

Author: pujagani

java/src/org/openqa/selenium/grid/config/ConfigFlags.java

@@ -29,6 +29,7 @@
 
 import java.io.PrintStream;
 import java.nio.file.Path;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -109,6 +110,8 @@ public boolean dumpConfigHelp(Config config, Set<Role> currentRoles, PrintStream
 
     StringBuilder demoToml = new StringBuilder();
     demoToml.append("Configuration help for Toml config file").append("\n\n");
+    demoToml.append("In case of parsing errors, validate the config using https://www.toml-lint.com/").append("\n\n");
+    demoToml.append("Refer https://toml.io/en/ for TOML usage guidance").append("\n\n");
     allOptions.forEach((section, options) -> {
       demoToml.append("[").append(section).append("]\n");
       options.stream().filter(option -> !option.hidden).forEach(option -> {
@@ -119,22 +122,24 @@ public boolean dumpConfigHelp(Config config, Set<Role> currentRoles, PrintStream
         if (!option.defaultValue.isEmpty()) {
           demoToml.append("# Default: ").append(option.defaultValue).append("\n");
         }
-        demoToml.append("# Example: ").append("\n");
-        if (option.prefixed) {
-          demoToml.append("[[")
-            .append(section)
-            .append(".")
-            .append(option.optionName)
-            .append("]]")
-            .append(option.example(config))
-            .append("\n\n");
-        } else {
-          demoToml.append(option.optionName)
-            .append(" = ")
-            .append(option.example(config)).append("\n\n");
-        }
+        Arrays.stream(option.example()).forEach(example -> {
+          demoToml.append("# Example: ").append("\n");
+          if (option.prefixed) {
+            demoToml.append("[[")
+              .append(section)
+              .append(".")
+              .append(option.optionName)
+              .append("]]")
+              .append(option.example(config, example))
+              .append("\n\n");
+          } else {
+            demoToml.append(option.optionName)
+              .append(" = ")
+              .append(option.example(config, example)).append("\n\n");
+          }
+        });
+        demoToml.append("\n");
       });
-      demoToml.append("\n");
     });
 
     dumpTo.print(demoToml);

java/src/org/openqa/selenium/grid/config/ConfigValue.java

@@ -36,5 +36,5 @@
 
   boolean prefixed() default false;
 
-  String example();
+  String[] example();
 }

java/src/org/openqa/selenium/grid/config/DescribedOption.java

@@ -30,6 +30,7 @@
 import java.lang.reflect.Field;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
@@ -50,7 +51,7 @@ public class DescribedOption implements Comparable<DescribedOption> {
   public final String optionName;
   public final String description;
   public final String type;
-  public final String example;
+  public final String[] example;
   public final String defaultValue;
   public final boolean prefixed;
   public final boolean repeats;
@@ -133,11 +134,11 @@ public boolean requiresTomlQuoting() {
     return quotable;
   }
 
-  public String example() {
+  public String[] example() {
     return example;
   }
 
-  public String example(Config config) {
+  public String example(Config config, String example) {
     Optional<List<String>> allOptions = config.getAll(section, optionName);
     if (allOptions.isPresent() && !allOptions.get().isEmpty()) {
       if (repeats) {
@@ -179,7 +180,7 @@ public boolean equals(Object o) {
            Objects.equals(description, that.description) &&
            Objects.equals(defaultValue, that.defaultValue) &&
            Objects.equals(type, that.type) &&
-           Objects.equals(example, that.example) &&
+           Arrays.equals(example, that.example) &&
            Objects.equals(flags, that.flags);
   }
 
@@ -189,7 +190,7 @@ public int hashCode() {
                         optionName,
                         description,
                         type,
-                        example,
+                        Arrays.hashCode(example),
                         repeats,
                         quotable,
                         flags,