2.1.6.r9406 r9413 display error for number label

I just noticed that new releases (at least 2.1.6.r9406 and 9413) display

'n<sup>o</sup>' (without quotes)

when it should display 'n°' :

When I noticed the error:
- I uninstalled the r9406
- re-installed 2.1.6, saw it was OK
- installed the last release, which was then r9413, saw there was the same error as in r9406

Hoping it can be soon repaired

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