made "NitpickHOL.normalized_rhs_of" more robust in the face of locale definitions
lcp paulson
norbert.schirmer@web.de schirmer
urbanc@in.tum.de urbanc
nipkow@lapbroy100.local nipkow
chaieb@chaieb-laptop chaieb
immler@in.tum.de immler
tsewell@rubicon.NSW.bigpond.net.au tsewell
tsewell@nicta.com.au tsewell