Documentation example for "a_sub^super" does not match current behavior

[Sebachin86]

Hello!

While testing pytexit 0.4.0 with Python 3.13.6, I noticed that the example in the user guide:

py2tex("a_sub^super")

is described as converting "sub" to a subscript and "super" to a superscript.

However, the current output is:

a_{sub}\operatorname{xor}super

which seems to interpret "^" as XOR instead of a superscript.

I'm not sure whether this is intended behavior or whether the documentation needs to be updated, but I wanted to report the inconsistency.

Thanks for maintaining this project!