[ci skip] Fix a typo in Rakefile.
Merge pull request #3012 from JuanitoFatas/patch/fix-a-typo

[ci skip] Fix a typo in Rakefile.
Make a point about adding failing tests for bugs
Merge pull request #3013 from mattwynne/patch-1

Make a point about adding failing tests for bugs
links for contributing tasks

[ci skip]
clean up allowed_gem_host test

  - use a Gem::Requirement
  - change to Rubygems 2.0, when metadata support was added
  - depend on Rubygems 2.0 or greater
  - add test metadata support for Rubygems 2.0-2.2
depend on rake 10.x, semantically

makes rubygems happy
Revert "Merge pull request #2988 from mvz/issue-2774-rbx-deps"

As seen in later tests, Rubygems does not recognize a Rubinius platform.
That makes this infeasible. We either need to add Rubinius to Rubygems as
a platform, or come up with another way to exclude Rubinius-only gems.

This reverts commit 20892c8d6741cf99ac5307d8a07055a3cd1a77f3, reversing
changes made to abcb4237f3dec316c42d58ec9037929c12a8da91.
Override all editor ENV variables in bundle open spec

This makes sure none of these variables take their value from the
developer's environment and cause unwanted editors to be launched.
Merge pull request #3016 from mvz/do-not-launch-editor-running-specs-locally

Override all editor ENV variables in bundle open spec
Typo in Bundler::EndpointSpecification#require_paths
Add more explanation to spec.description for bundle gem template.

"Optional" sounds like you can leave this value unchanged, but will
raise an exception in this case, aborting before the gem is built:

  WARNING:  See http://guides.rubygems.org/specification-reference/ for help
  ERROR:  While executing gem ... (Gem::InvalidSpecificationException)
    "FIXME" or "TODO" is not a description
move the dev deps list into the gemspec
depend on rspec 3 now the codebase is updated
tell people with old rspec to run spec:deps
anchor gitignores, remove non-bundler stuff
explain how ignoring man pages works
update to shared email address
align the params
move spec task options into options file