Hello,
 spaces are missing in the french fr.po.
Here's a diff to fix it,

 Greatings,
             bubu

A670 FB2A 3958 A27E 7907  B64E 05FC 409F 82B8 91B2

Hi, there are some more suggestions in 1106893, I attached the email,
please have a look and let me know what we should merge. I have not
done a review yet due to the conflicting states.

I can also do a full review of the 3.0 interface translation first
from a visual perspective, given the lack of language knowledge.

This change is correct to match the actual headings:



msgid "Upgrading:"
msgstr "Mis à jour :"

msgid "Installing:"
msgstr "Installation de :"

msgid "Installing dependencies:"
msgstr "Installation de dépendances : "

msgid "REMOVING:"
msgstr "SUPPRESSION :"

msgid "Not upgrading:"
msgstr "Pas mis à jour :"

msgid "Upgrading:"
msgstr "Mis à jour :"

msgid "DOWNGRADING:"
msgstr "RÉTROGRADÉ :"

these should match with

msgid "Upgrading: %lu, Installing: %lu, "
msgstr "Mise à niveau de : %lu. Installation de : %lu. "

msgid "Reinstalling: %lu, "
msgstr "Réinstallation de : %lu. "

msgid "Downgrading: %lu, "
msgstr "Rétrogradage de : %lu. "

#, c-format
msgid "Removing: %lu, Not Upgrading: %lu\n"
msgstr "Supprimé : %lu. Non mis à jour : %lu\n"


The first group of items is section headings explaining
actions to be taken with lists of packages; whereas the
second builds a summary line with the numbers for each
section.

Therefore, all of these verbs should use the same tense,
and matching terms should be actually matching, not

RÉTROGRADÉ vs Rétrogradage de 
Mis à jour vs Mise à niveau de


It seems to me that the grammatical forms are different
on the sections which is ill-advised, it should indicate
an action. Common forms in other langauges are progressive verbs
(Installing:), imperative forms (Install:), or future tense
(Will Install:  - not used in english because too long).

It should be clear to the user that these are actions that
will be taken by coherent tenses that indicate an action in
your language, in the fewest words possibly, and not necessarily
grammatically complete ("Installing:" also is not complete, it
would be "will be installing" or "am installing" or something).

I hope this helps and I apologize for the hard to work with
strings. I hope to, in the future, reduce this to an ordered
set of strings in the form that you get

"Installing" // TRANSLATORS: Long version for heading a section
"Installing" // TRANSLATORS: Short version for summary line

or just one of them (and we compose the summary from the actual
translations for the real section titles), or only complete
summary lines.