Thanks for the pointers here, Mario.
The solution I settled on was to start at the overview level and use the
NEWS file, eg:
https://github.com/ruby/ruby/blob/ruby_2_3/NEWS
The GitHub URLs make it easy to get the file for the desired version (or
just use the branch drop-down).
The text can then be copy/pasted into:
http://github-markup.dfilimonov.com/
for pretty viewing online.
In terms of what's new:
The &. syntax in v2.3.0 (Happy Christmas) looks interesting:
new method call syntax, `object&.foo', method #foo is called on `object'
if it is not nil.
obj.try!(:foo, bar()) # bar() is always evaluated
obj&.foo(bar()) # bar() is conditionally evaluated
* attribute assignment is valid
obj&.attr += 1
Regards,
Tom
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