ci: rename "trial" tox factor to "twisted"

Ref: https://github.com/pytest-dev/pytest/pull/4848#issuecomment-467909204

.travis.yml

@@ -68,7 +68,7 @@ jobs:
     # Specialized factors for py37.
     # Coverage for:
     # - test_sys_breakpoint_interception (via pexpect).
-    - env: TOXENV=py37-pexpect,py37-trial PYTEST_COVERAGE=1
+    - env: TOXENV=py37-pexpect,py37-twisted PYTEST_COVERAGE=1
     - env: TOXENV=py37-pluggymaster-xdist
     - env: TOXENV=py37-freeze
 
@@ -80,7 +80,7 @@ jobs:
     - stage: baseline
     # Coverage for:
     # - _pytest.unittest._handle_skip (via pexpect).
-      env: TOXENV=py27-pexpect,py27-trial PYTEST_COVERAGE=1
+      env: TOXENV=py27-pexpect,py27-twisted PYTEST_COVERAGE=1
       python: '2.7'
     # Use py36 here for faster baseline.
     - env: TOXENV=py36-xdist

azure-pipelines.yml

@@ -30,9 +30,9 @@ jobs:
         # - numpy
         # - pytester's LsofFdLeakChecker (being skipped)
         PYTEST_COVERAGE: '1'
-      py27-trial:
+      py27-twisted:
         python.version: '2.7'
-        tox.env: 'py27-trial'
+        tox.env: 'py27-twisted'
         python.needs_vc: True
       py27-pluggymaster-xdist:
         python.version: '2.7'
@@ -40,7 +40,7 @@ jobs:
         # Coverage for:
         # - except-IOError in _attempt_to_close_capture_file for py2.
         #   Also seen with py27-nobyte (using xdist), and py27-xdist.
-        #   But no exception with py27-pexpect,py27-trial,py27-numpy.
+        #   But no exception with py27-pexpect,py27-twisted,py27-numpy.
         PYTEST_COVERAGE: '1'
       pypy:
         python.version: 'pypy'
@@ -76,9 +76,9 @@ jobs:
       py37-linting/docs/doctesting:
         python.version: '3.7'
         tox.env: 'linting,docs,doctesting'
-      py37-trial/numpy:
+      py37-twisted/numpy:
         python.version: '3.7'
-        tox.env: 'py37-trial,py37-numpy'
+        tox.env: 'py37-twisted,py37-numpy'
       py37-pluggymaster-xdist:
         python.version: '3.7'
         tox.env: 'py37-pluggymaster-xdist'

tox.ini

@@ -13,7 +13,7 @@ envlist =
     py38
     pypy
     pypy3
-    {py27,py37}-{pexpect,xdist,trial,numpy,pluggymaster}
+    {py27,py37}-{pexpect,xdist,twisted,numpy,pluggymaster}
     py27-nobyte-xdist
     doctesting
     py37-freeze
@@ -67,7 +67,7 @@ basepython = python3
 deps = pre-commit>=1.11.0
 commands = pre-commit run --all-files --show-diff-on-failure
 
-[testenv:py27-trial]
+[testenv:py27-twisted]
 deps =
     {[testenv]deps}
     twisted
@@ -75,9 +75,9 @@ deps =
 commands =
     {env:_PYTEST_TOX_COVERAGE_RUN:} pytest {posargs:testing/test_unittest.py}
 
-[testenv:py37-trial]
+[testenv:py37-twisted]
-deps = {[testenv:py27-trial]deps}
+deps = {[testenv:py27-twisted]deps}
-commands = {[testenv:py27-trial]commands}
+commands = {[testenv:py27-twisted]commands}
 
 [testenv:docs]
 basepython = python3