Hello,

On 2017-09-14 11:45 PM, Bernhard Voelker wrote:
>> On 2017-09-14 11:43 AM, Eric Mariaud wrote:
>>> eric@Eric-Xub:~/Bureau$ expr 2 * 3
>>> expr: erreur de syntaxe
> 
> Well, we could try to improve the error diagnostics.
> 
> WDYT?

Very good idea.

Perhaps something like the attached? (not fully tested...)

-assaf