The plain text parser doesn't parse \ as a special character

Steps to reproduce:

• Parse some text containing \ with the plain text parser.

Expected result:

The \ character is parsed as special symbol and represented as such in the XDOM, similar to when the same text is parsed as xwiki/2.0 syntax for example.

Actual result:

The \ character is parsed as regular character and part of a word block in the XDOM.