text search algorithm can cause false positives

Problem/Motivation

The text search normalises the body text and the term names, by converting all non a-z characters to spaces.

However, this means that accented characters and punctuation are replaced with spaces which will split words.

So for example, the term name 'Sébastien' will be found in the text: "We're delighted to welcome Mr S. Bastien to our team."

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes