Ruby client: remove trailing slashes from base_url

Closes #1399

modules/swagger-codegen/src/main/resources/ruby/configuration.mustache

@@ -138,7 +138,7 @@ module {{moduleName}}
     end
 
     def base_url
-      url = "#{scheme}://#{[host, base_path].join('/').gsub(/\/+/, '/')}"
+      url = "#{scheme}://#{[host, base_path].join('/').gsub(/\/+/, '/')}".sub(/\/+\z/, '')
       URI.encode(url)
     end
 

samples/client/petstore/ruby/lib/petstore/configuration.rb

@@ -138,7 +138,7 @@ module Petstore
     end
 
     def base_url
-      url = "#{scheme}://#{[host, base_path].join('/').gsub(/\/+/, '/')}"
+      url = "#{scheme}://#{[host, base_path].join('/').gsub(/\/+/, '/')}".sub(/\/+\z/, '')
       URI.encode(url)
     end
 

samples/client/petstore/ruby/spec/configuration_spec.rb

@@ -0,0 +1,25 @@
+require 'spec_helper'
+
+describe Petstore::Configuration do
+  let(:config) { Petstore::Configuration.instance }
+
+  before(:each) do
+    Petstore.configure do |c|
+      c.host = 'petstore.swagger.io'
+      c.base_path = 'v2'
+    end
+  end
+
+  describe '#base_url' do
+    it 'should have the default value' do
+      config.base_url.should == 'http://petstore.swagger.io/v2'
+    end
+
+    it 'should remove trailing slashes' do
+      [nil, '', '/', '//'].each do |base_path|
+        config.base_path = base_path
+        config.base_url.should == 'http://petstore.swagger.io'
+      end
+    end
+  end
+end