Formatter/Wakka indent tab+space not working

[J9rem]

Type of issue (keep only one) / Type de demande (ne garder qu'une ligne)
Bug / Bogue

Description
Use indentation is possible in YesWiki with spaces or tabs.
_-_text (_ = space) gives

• text

---

_-_text
__-_text

gives

• text
• text

---

\t-_text (_ = space) gives

• text

---

\t-_text
\t\t-_text

gives

• text
• text

---

but

\t-_text
\t__-_text with tab AND space before

gives

• text
• - text with tab AND space before

the combination of tabulation and space on same line is not working.
Furthermore, with using this

_-_first line
\t-_second line

it gives

• first line
• seconde line

whereas, during page edit, the text is displayed like that

 - first line
   - seconde line

It is not stable because tab is displayed as 4 spaces but considered like one space when formatting wakka

Additionnal informations / Informations complémentaires

• version of YesWiki / version de YesWiki doryphore 4.2.4