Strange text output from editor

[blastfire]

I created the text in an HTML editor now I copy and paste the code in to the editor and save everything:

This is how everything must look, now after is saved it on my webpage it looks like this:
To many spaces between the text. What could be the issue?

I use the warehouse theme.

[JHKCreate]

Hi @blastfire !

Would you mind sharing your store's URL so we can have a look here?

[blastfire · Accepted solution]

i found the issue: 

Some one from fiverr changed a code, so i will never hire one again.
he put in this code in the theme.liquid

<style>
.product-block-list__item--description .rte br{
/* line-height: 1% !important; */
display: block !important;
margin: 20px 0px !important;
content: " ";
}
.rte span{
line-height: 1.1 !important;
}
.rte p{
line-height: 1.1 !important;
}
.rte img, .rte .video-wrapper{
margin-top:0px !important;
margin-bottom:0px !important;
}
</style>

Now i removed it and only changed this for the height of the spaces: