doc-src/IsarImplementation/Thy/ROOT.ML

replaced generic 'hide' command by more conventional 'hide_class', 'hide_type', 'hide_const', 'hide_fact' -- frees some popular keywords;

use_thys [
  "Integration",
  "Isar",
  "Local_Theory",
  "Logic",
  "ML",
  "Prelim",
  "Proof",
  "Syntax",
  "Tactic"
];