Hello,
There is obviously a problem with TemplateStyles on frwiki.
As bug reported [[ https://fr.wikipedia.org/wiki/Wikipédia:Questions_techniques/semaine_24_2020#Léger_problème_d'affichage_dans_le_TemplateData | here ]], after investigation, unwanted content seems to be added in the TemplateStyles CSS.
The bug is visible in TemplateData blocks, like [[ https://fr.wikipedia.org/wiki/Mod%C3%A8le:Projet#TemplateData | here ]] : `Exemple  : Infobox` is displayed, instead of: `Exemple : Infobox`
The CSS TemplateStyles sheet : [[ https://fr.wikipedia.org/wiki/Modèle:Méta_documentation_de_modèle/styles.css | Modèle:Méta documentation de modèle/styles.css ]]
In particular, this rule:
```
lang=css
.mw-templatedata-doc-params dt:after {
content: "\a0:\a0";
```
Is modified as follows in the source code in the page:
```
lang=css
.mw-parser-output .mw-templatedata-doc-params dt:after{content:"\a0 :\a0 "}
```
The code:
```
lang=css
content: "\a0:\a0";
```
Is incorrectly replaced by:
```
lang=css
content: "\a0 :\a0 "
```
By investigating a little, it may be __possible__ that this bug is related to the modifications made T197879
Thank you.
(sorry for my bad English)