Code blocks => being replaced with = >

[robe]

As noted in ​https://lists.osgeo.org/pipermail/postgis-users/2023-December/046287.html

Code blocks with ⇒ are being converted to = > in the translated docs. code blocks don't make it to .pot files I don't think, so I suspect this is totally something in our conversion from po to xml

Case in point is - ST_Clip where I used ⇒ touched

​https://postgis.net/docs/manual-dev/zh_Hans/RT_ST_Clip.html

So I could skip over other default options