Some Precisions before 1.9.2

Yes/no type questions:

Which is the right behavior for class variables? #1469

Should #lines ignore a given block or be an alias to #each_line ? #1666

Should file prefer #to_path over #to_str? #1760

Should "hello\xff".to_sym fail? #1843

Should Enumerable#join call #to_a on the all elements responding to it or just arrays? #1893

Should "attr_reader :foo?" be valid? How about "Struct(:foo?)"? #1983

Should (1..3).max(&lambda{|x,y|x<=>y}) raise an error? #2184

Should eval accept a Proc? #2211

Less defined questions:

Immediates: easy way to dup an immediate? #1844