Thanks!! I applied the “dirty” trick and it worked immediately 
Now I have one last “problem”.
Since I now use separation between the different categories, the layout is not very beautiful anymore.
Therefore I would like to show the “leave a comment” on a new line, below the author and the categories.
Can I also achieve this via CSS? How can I do this?
Then I’m all set for my blog 
This is my current CSS for the meta data on the blog:
.p-meta span > a {
background-color: black;
padding: 2px 8px;
}
.p-meta span:last-child a {
background: none;
}
.p-meta span a {color: #d7ac44; font-weight:600;}
.p-meta span:first-child,
.p-meta span:last-child {background-color: transparent;}
.p-meta span:last-child a {
color: rgb(68, 144, 215);
margin-left: 12px;
}
.p-meta span a:hover {
color: white;
}
.p-meta span:last-child a:hover {
color: rgb(215, 172, 68);
}
.p-meta span:after {
color: transparent;
}
.p-meta span:nth-child(3) {
color:white;
}
Thanks in advance!