Steps to reproduce:

• create a simple page with just this text: <syntaxhighlight lang="xml">></syntaxhighlight>
• example page: https://test2.wikipedia.org/wiki/Codez
• when the page is saved, only this is displayed, as expected: >

• edit the page with visual editor
• edit the text using syntaxhighlight editor
• for example, add just this: <
• see attached screen shot #1

• use "back" icon to see how the text will look like
• I was expecting to see this as page text: ><
• instead, the preview says page text is: &gt;&lt;
• see attached screen shot #2

• when the page is saved, the text is displayed correctly: ><
• see attached screen shot #3

Version: unspecified
Severity: minor