I've noticed that when using TinyMCE 5 inline it inserts a load of extra elements that I really don't want.
<span id="_mce_caret" data-mce-bogus="1" data-mce-type="format-caret">H</span><sup>2</sup>O
what I'd expect is
H<sup>2</sup>O
Is there any way within Tiny to stop doing this? Alternatively I supose I could get it to remove all the excess before submitting the form.
How are you getting the content from TinyMCE? The various data-mce-xxxx attributes are internal markers used during the editing process but they should not be returned when using getContent().
If I create a simple TinyMCE Fiddle and create content with the two characters as either superscript or subscript I don't get this extra markup when extracting the content: