Improve CLI usage output

* Move -h option at tail;
* Add separator between standard and tail options.

features/steps/output_steps.rb

@@ -3,13 +3,14 @@ Then /^the output must contain exactly the usage$/ do
 Usage: uhwm [options]
 
 options:
-    -h, --help                       print this message
     -v, --verbose                    enable verbose mode
     -d, --debug                      enable debug mode
     -f, --run-control PATH           specify alternate run control file
     -r, --require PATH               require ruby feature
     -l, --layout LAYOUT              specify layout
     -w, --worker WORKER              specify worker
+
+    -h, --help                       print this message
     -V, --version                    print version
   eoh
 end

lib/uh/wm/cli.rb

@@ -49,40 +49,35 @@ module Uh
           opts.separator ''
           opts.separator 'options:'
 
-          opts.on '-h', '--help', 'print this message' do
-            @env.print opts
-            exit
-          end
-
           opts.on '-v', '--verbose', 'enable verbose mode' do
             @env.verbose = true
             @env.log_logger_level
           end
-
           opts.on '-d', '--debug', 'enable debug mode' do
             @env.debug = true
             @env.log_logger_level
           end
-
           opts.on '-f', '--run-control PATH',
               'specify alternate run control file' do |e|
             @env.rc_path = e
           end
-
           opts.on '-r', '--require PATH', 'require ruby feature' do |feature|
             require feature
             @env.log "Loaded `#{feature}' ruby feature"
           end
-
           opts.on '-l', '--layout LAYOUT', 'specify layout' do |layout|
             @env.layout_class = self.class.const_get layout.to_sym
           end
-
           opts.on '-w', Workers.types, '--worker WORKER',
               'specify worker' do |worker|
             @env.worker = worker.to_sym
           end
 
+          opts.separator ''
+          opts.on_tail '-h', '--help', 'print this message' do
+            @env.print opts
+            exit
+          end
           opts.on_tail '-V', '--version', 'print version' do
             @env.puts VERSION
             exit

spec/uh/wm/cli_spec.rb

@@ -106,20 +106,6 @@ module Uh
       end
 
       describe '#parse_arguments!' do
-        context 'with help option' do
-          let(:arguments) { %w[-h] }
-
-          it 'prints the usage banner on standard output' do
-            trap_exit { cli.parse_arguments! }
-            expect(stdout.string).to match /\AUsage: .+/
-          end
-
-          it 'prints options usage on standard output' do
-            trap_exit { cli.parse_arguments! }
-            expect(stdout.string).to match /\n^options:\n\s+-/
-          end
-        end
-
         context 'with verbose option' do
           let(:arguments) { %w[-v] }
 
@@ -185,6 +171,20 @@ module Uh
           end
         end
 
+        context 'with help option' do
+          let(:arguments) { %w[-h] }
+
+          it 'prints the usage banner on standard output' do
+            trap_exit { cli.parse_arguments! }
+            expect(stdout.string).to match /\AUsage: .+/
+          end
+
+          it 'prints options usage on standard output' do
+            trap_exit { cli.parse_arguments! }
+            expect(stdout.string).to match /\n^options:\n\s+-/
+          end
+        end
+
         context 'with version option' do
           let(:arguments) { %w[-V] }