Labels force a paragraph wrapper around content which produces a carriage return that may be undesirable and cannot be removed. Deleting these tags when in HTML mode doesn't help; the tags return.
• Create a new label resource with a single line of text.
• Create a second label in the same section as the first.
• Notice the extra space between the first a second labels.
This can be confirmed another way when editing the label content in an HTML source editor. "<p></p>" wrap around any content that is saved in the WYSIWYG editor.