TangoCMS

When the default editor is set to 'HTML', and the 'Editor' module is loaded (so TinyMCE loads), manually adding a different shebang (such as #!plaintext) does not alter the editor used when saved, instead '#!plaintext' will become part of the page.

Steps to reproduce:

• Set editor to HTML, ensure Editor module loads with TinyMCE
• Type on the first line, #!plaintext followed by new line then some random text
• Save and view the page

Expected Results

• Page should be rendered using plaintext editor, and '#!plaintext' should not appear in the document

Actual results:

• Html editor is still used, with '#!plaintext' displaying in the page.