Update x Upgrade database

[pavelevap]

We are updating database for single site, but upgrading for multisite. We can merge it and remove 2 similar strings. We can still "Upgrade Network", but database should be "updated".

See attached patch.

[pento]

I'm cool with making the text change, but I'm wondering about the strings around it.

Should "we need to individually upgrade the sites in your network" be changed to say "update", too?

"Upgrade" in "Upgrade Network" then feels out of place. The equivalent button in single site says "Update WordPress Database".

[dd32]

The verbiage we mostly use is, Update means a filesystem change, Upgrade means a database change.

Of course, it's actually WP_Upgrader which does filesystem changes :) but upgrade.php contains database-upgrade routines.

[pavelevap]

OK, so I can reverse it :-) Upgrade for database and Update for filesystem seems reasonable, so we can change 2 single site strings (we are also within upgrade.php file). I only wanted to remove 2 similar strings with different words (found during translation)...

[SergeyBiryukov]

Previously in #24931:

nacin: not sure about the second one - while we try to use "update" to mean one thing and "upgrade" to mean the other, the important part is "update"
nacin: the second part ("upgrade" meaning a DB upgrade) has always kind of been a corollary, but not necessarily set in stone
nacin: in this case we're linking it specifically to the word "database"
nacin: SergeyBiryukov: talked to jenmylo. "Update" should be preferred wherever it makes sense, including here.
nacin: I don't necessarily think that runs afoul of r23619.

33514.2.patch​ merges the strings and keeps "database update" on both screens.

[SergeyBiryukov]

In 35000:

Merge two database update strings for consistency.

Props pavelevap.
Fixes #33514.