Add trailing space to list of strings

I have a list of lines like this:

my_list = ['Lorem ipsum dolor sit amet,', 'consectetur adipiscing elit. ', 'Mauris id enim nisi, ullamcorper malesuada magna.']

      

        
        
        
      

    

I want to basically concatenate these elements into one readable line. My logic is this:

If the list item does not end with a space, add one
otherwise, leave it alone
Then combine them all into one string.

      

        
        
        
      

    

I was able to accomplish this in several different ways.

Using list comprehension:

message = ["%s " % x if not x.endswith(' ') else x for x in my_list]
messageStr = ''.join(message)

      

        
        
        
      

    

State it (I think it's a little more readable):

for i, v in enumerate(my_list):
    if not v.endswith(' '):
        my_list[i] = "%s " % v
messageStr = ''.join(my_list)

      

        
        
        
      

    

My question is, is there an easier, "smarter" way to accomplish this?