- Stops HTTP pagination once the limit has been reached
- Cleans up client implementation by passing around a filter block

This shows commented-out text such as "Creating an issue for github/hub"
not only when `-m` or `-F` weren't passed, but also when they were
passed and `--edit` was used.

The commit body comes first, then template text. This is for
compatibility with GitHub web interface.

Fixes #1657

Previously, passing `--edit` in combination with `-m` would skip opening
the editor. For compatibility with `git commit`, `--edit` is now always
respected.

This is to avoid having a writeable fork added with `git://` protocol
(the default when `hub.protocol` is not configured).

This matches the behavior of `hub clone`.

Before, the code outside of `editor.go` was responsible for prefixing
lines of the commented section with the comment char. The code to do
this was scattered all over the codebase and was difficult to refactor
re: adding support for `commentchar=auto`.

Now, Editor has a `AddCommentedSection()` method that allows for
declarative adding of a commented section. Furthermore, the caller
doesn't have to query git to determine the comment char.

Fixes https://github.com/github/hub/issues/1423

When any of these global flags are passed, don't try to decorate the
output as if `git help` was invoked.

Fixes https://github.com/github/hub/issues/1446

`git rev-parse --show-toplevel` returns an empty string with success
status when inside a bare git repo.

This avoids the go crash and also tweaks `hub issue` and `hub
pull-request` to work even if current working directory name couldn't be
obtained because it's only used for looking up issue/PR templates, which
isn't critical functionality.

Fixes https://github.com/github/hub/issues/1331

The rest of the sections are sorted alphabetically. This makes the hub
commands easier to read by sorting them the same way.

This is for consistency with `--include-drafts` (also plural).

We need to be in a git repo for the tests to work.

This is the only way I know how to get info out from hub while running
the cucumber feature tests.

Should be removed before submitting as a PR.

It prints the help text.

"hub pr" still untested.

Help still untested.