如何在散列中从字符串中删除空格

Here's my example:

这是我的例子:

hash = {"buy"=>"Buy ", "quantity"=>"3 ", "get"=>"Get ", "reward"=>"1 ", "free"=>"Free"}

def stripit(value)
  #value.gsub!('B', 'C')
  value.gsub!('/\s+/', '')
  value
end

newhash = hash.update(hash){|key,value| stripit(value)}
puts newhash.inspect
hash = {"buy"=>"