Question about the light and minimal French stemmers

[Adrien Gallou <ad...@gmail.com>]

Hi,

I'm using both light and minimal French stemmers and encountered an issue
when using the minimal stemmer.

The light stemmer removes the last character of a word if the last two
characters are identical.
We can see that here:
https://github.com/apache/lucene-solr/blob/master/lucene/analysis/common/src/java/org/apache/lucene/analysis/fr/FrenchLightStemmer.java#L263
In this light stemmer, there is a check to avoid altering the token if the
token is a number.

The minimal stemmer also removes the last character of a word if the last
two characters are identical.
We can see that here:
https://github.com/apache/lucene-solr/blob/master/lucene/analysis/common/src/java/org/apache/lucene/analysis/fr/FrenchMinimalStemmer.java#L77

But in this minimal stemmer there is no check to see if the character is a
letter or not.
So when we have numeric tokens with the last two characters identical they
are altered.

Is there a reason for this?
Should I file an issue on Jira to add this check?

Thanks,

Adrien Gallou