Result of merge showing strange dots in table view of Power BI

[Anonymous]

I merged 3 columns in Power Query together.  To the best of my knowlege the 3 columns had rows that were either all populated with Date | Whole Number | Whole Number

OR 

Null | Null | Null

It appears after doing the merge and bringing into POWERBI that the merged column has rows that aren't truly empty where I expected them to be (from the merge of 3 null or empty values).  Instead the column shows 4 little gray stacked dots.  My coworkers hadn't seen this before and googling I can't find any info.  Does anyone know what caused this and what it means?

 

[HotChilli · Accepted solution]

These are the semi-colons from the Merge command

[Anonymous]

Oh, haha, duh.  Thank you.