Update the docs.

doc/en/Authoring/Answer_Tests/Results/AlgEquiv.md

doc/en/Authoring/Answer_Tests/Results/CasEqual.md

doc/en/Authoring/Answer_Tests/Results/EqualComAss.md

doc/en/Authoring/Answer_Tests/Results/Equiv.md

doc/en/Authoring/Answer_Tests/Results/NumSigFigs.md

doc/en/Authoring/JSXGraph.md

doc/en/Developer/Development_track.md

doc/en/Developer/Extracting_test_questions.md

doc/en/Developer/Releasing.md

doc/meta_en.json