tox: Use consistent indentation

Change-Id: Ifd46511b4b9a35cb4055734a8f6e35135957c996
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

tox.ini

@@ -4,33 +4,35 @@ envlist = py3,pep8
 
 [testenv]
 usedevelop = True
-setenv = VIRTUAL_ENV={envdir}
-         OS_STDOUT_CAPTURE=1
-         OS_STDERR_CAPTURE=1
-         OS_TEST_TIMEOUT=60
+setenv =
+  OS_STDOUT_CAPTURE=1
+  OS_STDERR_CAPTURE=1
+  OS_TEST_TIMEOUT=60
 deps =
-       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
-       -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
-commands = find . -type f -name "*.pyc" -delete
-           stestr run {posargs}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -r{toxinidir}/requirements.txt
+  -r{toxinidir}/test-requirements.txt
+commands =
+  find . -type f -name "*.pyc" -delete
+  stestr run {posargs}
 allowlist_externals = find
 
 [testenv:pep8]
 skip_install = true
 deps =
-    pre-commit
+  pre-commit
 commands =
-    pre-commit run -a
+  pre-commit run -a
 
 [testenv:cover]
-setenv = {[testenv]setenv}
-         PYTHON=coverage run --source zaqarclient --parallel-mode
+setenv =
+  {[testenv]setenv}
+  PYTHON=coverage run --source zaqarclient --parallel-mode
 commands =
-    stestr -q run {posargs}
-    coverage combine
-    coverage html -d cover
-    coverage xml -o cover/coverage.xml
+  stestr -q run {posargs}
+  coverage combine
+  coverage html -d cover
+  coverage xml -o cover/coverage.xml
 
 [testenv:functional]
 setenv =