TYPO3 Core

Adding a link to a page created in an alternative language into text
in the htmlareaRTE.

To do this I need to manually add a link through the 'make link'
function of the RTE (as it is not currently possible to add links to an
alternative language page using the one tree model).

A page in English (default) is index.php?id=100 to add a link to is
refers to a Welsh page we just add &L=1 to this address.

Once the page is saved in the RTE I get an RTE error as follows (because
it is changing & to & RTE sees this (quite rightly) as a broken link
and adds the lovely yellow box with the red line).

The html source for the link should be:

<a href="index.php?id=147&L=1">LINK</a>

but on saving the RTE parses this as:

<a href="index.php?id=147&amp;L=1"
class="external-link-new-window" title="LINK" rteerror="No page
found: 0" style="border: 2px solid red; background-color: yellow; color:
black;">LINK</a>

making the link unusable.

(issue imported from #M5119)