reftex-label-illegal-re
reftex-label-illegal-re is a variable defined in `reftex-vars.el'.
Its value is "[^-a-zA-Z0-9_+=:;,.]"Documentation: Regexp matching characters not valid in labels. You can customize this variable.
reftex-vars.el'.
Its value is "[^-a-zA-Z0-9_+=:;,.]"Documentation: Regexp matching characters not valid in labels. You can customize this variable.