command of "tox -e docs" failed

[xhzhf]

command of "tox -e docs" failed:

doc/source/signing_backends.rst:74: D003 Tabulation used for indentation
doc/source/signing_backends.rst:75: D003 Tabulation used for indentation
doc/source/signing_backends.rst:76: D003 Tabulation used for indentation
doc/source/signing_backends.rst:77: D003 Tabulation used for indentation
doc/source/signing_backends.rst:52: D001 Line too long
========
Total files scanned = 9
Total files ignored = 0
Total accumulated errors = 5
Detailed error counts:
    - doc8.checks.CheckCarriageReturn = 0
    - doc8.checks.CheckIndentationNoTab = 4
    - doc8.checks.CheckMaxLineLength = 1
    - doc8.checks.CheckNewlineEndOfFile = 0
    - doc8.checks.CheckTrailingWhitespace = 0
    - doc8.checks.CheckValidity = 0
ERROR: InvocationError: '/home/openstack-git/anchor/.tox/docs/bin/doc8 --allow-long-titles doc/source'

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/434088
Committed: https://git.openstack.org/cgit/openstack/anchor/commit/?id=9d4ea65ef78197a3eec61255c5a3c076dcbb2732
Submitter: Jenkins
Branch: master

commit 9d4ea65ef78197a3eec61255c5a3c076dcbb2732
Author: xhzhf <[e-mail]>
Date: Wed Feb 15 10:03:56 2017 +0800

    command of "tox -e docs" failed

    error info of "tox -e docs" is below
    doc/source/signing_backends.rst:74: D003 Tabulation used for indentation
    doc/source/signing_backends.rst:75: D003 Tabulation used for indentation
    doc/source/signing_backends.rst:76: D003 Tabulation used for indentation
    doc/source/signing_backends.rst:77: D003 Tabulation used for indentation
    doc/source/signing_backends.rst:52: D001 Line too long
    This patch correct it
    Closes-Bug: #1664796

    Change-Id: I55798c2823f8a98ae7bfee0612c3a2639b4ca8d5