The package will directly insert nonbreakable spaces (in Czech, vlna or vlnka),
after nonsyllabic prepositions and single letter conjunctions, while the
document is being typeset. (The macros recognised maths and verbatim by TeX
means.) (Inserting nonbreakable spaces by a preprocessor will probably never be
fully reliable, because user defined macros and environments cannot reliably be
recognised.) The package works both with (Plain) XeTeX and with XeLaTeX.
