Minor: tox: coverage: use -m with coverage-report (#5427)

Minor:  tox: coverage: use -m with coverage-report

src/_pytest/_code/code.py

@@ -910,7 +910,6 @@ class ReprEntry(TerminalRepr):
             for line in self.lines:
                 red = line.startswith("E   ")
                 tw.line(line, bold=True, red=red)
-            # tw.line("")
             return
         if self.reprfuncargs:
             self.reprfuncargs.toterminal(tw)

tox.ini

@@ -20,7 +20,7 @@ envlist =
 commands =
     {env:_PYTEST_TOX_COVERAGE_RUN:} pytest {posargs:{env:_PYTEST_TOX_DEFAULT_POSARGS:}}
     coverage: coverage combine
-    coverage: coverage report
+    coverage: coverage report -m
 passenv = USER USERNAME COVERAGE_* TRAVIS PYTEST_ADDOPTS
 setenv =
     _PYTEST_TOX_DEFAULT_POSARGS={env:_PYTEST_TOX_POSARGS_LSOF:} {env:_PYTEST_TOX_POSARGS_XDIST:}