The formatting of "Lua memory usage" is incorrect for values above 1 MB (1024 kB).
See example in this screenshot.
A value of "3.04 MB" should be formatted/presented as "3,04 Mbyte" but it is presented as "3 04 Mbyte", i.e. there is a space where there should be a decimal comma sign.
Wikipedia version: 1.32.0-wmf.8 (rMW53a4a6c2204e) 15 juni 2018 kl. 00.14
The relevant messages here are scribunto-limitreport-memusage-value-html and size-megabytes.
What seems to be going on here is that Scribunto passes the size through Language::formatSize(), resulting in "3,04 MB" using comma as the decimal separator, and the MediaWiki passes it through Language::formatNum() again which interprets the comma as a thousands separator and turns it into a space.
This seems to have been caused by rMW2c3f2dd61cdf: Numbers in the parser profiling data are not internationalized when attempting to fix T158607: Numbers in the parser profiling data are not internationalized.
Changed the title of this task since the problem does not concern only Swedish Wikipedia (and maybe this way it will be more searchable for others). This bugged me for a long time in Russian (and I couldn’t really find where this comes from), good job on reporting this :-)
So, may ScribuntoHooks::formatLimitData hook be safely removed? or should it be hooked elsewhere than to ParserLimitReportFormat?
Untagging Parser and Debug-Logger, as it does not appear to be an issue with the parsing of wikitext, nor an issue with PSR-3, Monolog or MWExceptionHandler etc
This was probably fixed within efforts in T263592.
See example in this screenshot.
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