@Sebastiano Please refrain from doing any more tag wiki edits until you understand the concept of intellectual property. In your edit
tex.stackexchange.com/review/suggested-edits/167325 you copied verbatim whole paragraphs from the
spalign
documentation without mentioning the source of this text. Don't say you did not know this is wrong, this was discussed on multiple occasions, for example when you copied verbatim the ubuntu tag description from wikipedia.