Welcome to our community, Deb!
Here's how to "Un-gap" the text.
Preview the topic and note where the gap is occurring.
Dismiss the preview and locate text on either side of the
gap. As you said, it looks perfectly normal in the editor.
Select across the text on either side of the gap.
Change the view from WYSIWYG to HTML. This should show the
HTML code causing the issue.
Note that you should see something that looks like this:
<span style="margin-left: 24px;"> (the 24px probably
indicates a different value)
Delete the span tag. Everything from the < to the >.
<span style="margin-left: 24px;">
Note that this will leave behind an orphaned span tag that
looks like this:
</span>
Don't sweat that one. RoboHelp will clean it up for you.
Save the topic and return to WYSIWYG editing view.
Preview the topic and the unsightly gap should now be gone.
Cheers... Rick