What does a script-Tag with src AND content mean?

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执笔经年 2020-11-22 06:42

Example from Googles +1 button:


      
      
        
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                   既然无缘
                                             
                
                
                (楼主)
            
              
              
                2020-11-22 07:02
              

            
            
                        
According to the HTML5 draft specification, 

                                 
              

            

                          
    

        
         
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