Document bean validation constraints in help()

Fixes #147

spring-shell-standard-commands/src/test/java/org/springframework/shell/standard/commands/HelpTest.java

@@ -47,6 +47,8 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.util.FileCopyUtils;
 import org.springframework.util.ReflectionUtils;
 
+import javax.validation.constraints.Max;
+
 /**
  * Tests for the {@link Help} command.
  *
@@ -133,7 +135,8 @@ public class HelpTest {
 				// Multiple keys and arity 0. Help displayed on next line
 				@ShellOption(help = "Do not ask for confirmation. YOLO", arity = 0, value = {"-f", "--force"}) boolean force,
 				// Single key, arity >= 1. Help displayed on next line. Optional
-				@ShellOption(help = "The answer to everything", defaultValue = "42", value = "-n") int n,
+				// Also, bears bean validation annotation
+				@ShellOption(help = "The answer to everything", defaultValue = "42", value = "-n") @Max(5) int n,
 		        // Single key, arity > 1.
 		        @ShellOption(help = "Some other parameters", arity = 3, value = "-o") float[] o
 		) {

spring-shell-standard-commands/src/test/resources/org/springframework/shell/standard/commands/HelpTest-testCommandHelp.txt

@@ -1,23 +1,28 @@
-&
-&
-NAME&
-	first-command - A rather extensive description of some command.&
-&
-SYNOPSYS&
-	first-command [-r]  [-f]  [[-n] int]  [-o] float float float  &
-&
-OPTIONS&
-	-r	Whether to delete recursively  [Optional, default = false]&
-&
-	-f or --force&
-		Do not ask for confirmation. YOLO  [Optional, default = false]&
-&
-	-n  int&
-		The answer to everything  [Optional, default = 42]&
-&
-	-o  float float float&
-		Some other parameters  [Mandatory]&
-&
-ALSO KNOWN AS&
-	1st-command&
-&
+
+
+NAME
+	first-command - A rather extensive description of some command.
+
+SYNOPSYS
+	first-command [-r]  [-f]  [[-n] int]  [-o] float float float  
+
+OPTIONS
+	-r	Whether to delete recursively
+		[Optional, default = false]
+
+	-f or --force
+		Do not ask for confirmation. YOLO
+		[Optional, default = false]
+
+	-n  int
+		The answer to everything
+		[Optional, default = 42]
+		[must be less than or equal to 5]
+
+	-o  float float float
+		Some other parameters
+		[Mandatory]
+
+ALSO KNOWN AS
+	1st-command
+