Fix the broken URL for articles published by classiques Garnier (accessed through the Diderot library)

Apply a fix similar to c4e7d5e8 on the filter generating the glossary to make sure single quotes are not mistreated

Finish proofreading chapt.5 Contrasts (**TODO** the validation of the Parallel corpus still needs a fix)

Finish proofreading chapter 4 Classification (many changes, variable renamings in the equations, added an introductory ¶ + comments linking n-grams back to collocation)

Another job started in 5de4591c but not finished: the figures showing the encoding in Chapt.3 are automatically generated and shouldn't have been versioned, but the text was still referring to them instead of the new path triggering the Makefile rule

Move footnotes on syntax tooling from Corpus to Édla (already deleted from Corpus in 5de4591c, this commit should've been part of it)

Partially revert 3910d039 for ':' occurring after a parenthesis (explicitly written or generated by citeproc at the end of a citation), which were given no space while typography commands they should have one

Make glossary use alphabetical order (instead of char code) to make sure lowercase letters are not put at the end

Downplay the 'quantitative' aspect of corpus linguistics; textometry is qualitative too by relying on the direct reading of excerpts in context

Rework the order of the ¶ on ALRs in the ÉdlA + introduce the notion of syntactic cooccurrents more clearly

Take Frédérique's feedback about being more objective about the code into account (gave birth to a huge amount of discussion)