-- Geviertstrich „—" (U+2014) → Gedankenstrich „–" (U+2013), programmweit in der DB.
UPDATE glossar SET
  short = REPLACE(short, '—', '–'),
  text = REPLACE(text, '—', '–'),
  short_easy = REPLACE(short_easy, '—', '–'),
  text_easy = REPLACE(text_easy, '—', '–');
UPDATE glossar_examples SET
  text = REPLACE(text, '—', '–'),
  text_easy = REPLACE(text_easy, '—', '–');
UPDATE module_info SET
  subtitle = REPLACE(subtitle, '—', '–'),
  short_desc = REPLACE(short_desc, '—', '–'),
  long_desc = REPLACE(long_desc, '—', '–'),
  learning_goals = REPLACE(learning_goals, '—', '–'),
  short_desc_easy = REPLACE(short_desc_easy, '—', '–'),
  long_desc_easy = REPLACE(long_desc_easy, '—', '–'),
  learning_goals_easy = REPLACE(learning_goals_easy, '—', '–');