Merged r11527 from trunk to 2.3-stable (#13338, #13329)
Ruby2.0: remove "warning: class variable access from toplevel" in lib/plugins/rfpdf/lib/tcpdf.rb.
Contributed by Jun NAITOH.
Authored by: tmaruyama 2013-03-03
Parent: [r11532]
Child: [r11534]
