Fix tests on Windows

Author: goerz

test/test_bibliography_block_pages.jl

@@ -16,6 +16,8 @@ function prx(s)
         # to get a regex that works on Windows.
         rx = replace(rx, mapping)
     end
+    @show rx # DEBUG
+    @show Regex(rx) # DEBUG
     Regex(rx)
 end