U:RDoc::AnyMethod[iI"open_and_lock_file:EFI"PStore#open_and_lock_file;TF: privateo:RDoc::Markup::Document: @parts[ o:RDoc::Markup::Paragraph; [I"AOpen the specified filename (either in read-only mode or in ;TI"9read-write mode) and lock it for reading or writing.;To:RDoc::Markup::BlankLineo; ; [I"FThe opened File object will be returned. If _read_only_ is true, ;TI"