Ruby version file references non-existent version

[sonnysideup]

The .ruby-version file specifies version 2.2 but, according to rbenv, there is no version by that name available.

-> rbenv install 2.2
ruby-build: definition not found: 2.2

The following versions contain `2.2' in the name:
  2.2.0-dev
  2.2.0-preview1
  2.2.0-preview2
  2.2.0-rc1
  2.2.0
  2.2.1
  2.2.2
  rbx-2.2.0
  rbx-2.2.1
  rbx-2.2.2
  rbx-2.2.3
  rbx-2.2.4
  rbx-2.2.5
  rbx-2.2.6
  rbx-2.2.7
  rbx-2.2.9
  rbx-2.2.10

See all available versions with `rbenv install --list'.

Should this not be changed to 2.2.0?

[rickhull]

note, many ruby versioning projects support a .ruby_version file, but they may support different semantics. chruby might look at 2.2 and find the latest 2.2.x for you

[sonnysideup]

Hmm, I guess the question is which ruby versioning tool is being used and is there a "universal" format that each tool will accept?

This small change could easily lower the impedance for would-be contributors not using, say, chruby.