2019-02-07 Namespaces

I’ve changed the regular expression that checks the names of wikis. The new rule is:

  1. it must begin with an upper case letter or a digit
  2. all the remaining characters must be either letters, digits, a space, a non-breaking space (for backwards compatibility), or an underscore (sort of equivalent to a space, I guess)

For the technically minded, this is the Perl regular expression: [\p{Uppercase}\d][\w_  ]*.