In countries that use first-past-the-post legislative elections, drawing district maps that have political effects is called Gerrymandering. It is famously seen as shameless but nearly impossible to prevent. In the lawsuit-happy United States of America, lawsuits over redistricting (delimitation) have gone to the Supreme Court repeatedly.
India, the United Kingdom, Canada, Pakistan, and Malaysia also use first-past-the-post and also hear complaints about their district maps (several examples are given in Delimitation in India by Alistair McMillan). However, have these concerns been litigated outside of the United States? Cursory searching suggests not, but surely some disenfranchised minorities in those countries have also sued for redress?