Display message from reprcrash in short test summary

This is useful to see common patterns easily, but also for single
failures already.

src/_pytest/skipping.py

@@ -211,7 +211,25 @@ def show_simple(terminalreporter, lines, stat):
         for rep in failed:
             verbose_word = _get_report_str(config, rep)
             pos = _get_pos(config, rep)
-            lines.append("%s %s" % (verbose_word, pos))
+
+            line = "%s %s" % (verbose_word, pos)
+            try:
+                msg = rep.longrepr.reprcrash.message
+            except AttributeError:
+                pass
+            else:
+                # Only use the first line.
+                # Might be worth having a short_message property, which
+                # could default to this behavior.
+                i = msg.find("\n")
+                if i != -1:
+                    msg = msg[:i]
+                max_len = terminalreporter.writer.fullwidth - len(line) - 2
+                if len(msg) > max_len:
+                    msg = msg[: (max_len - 1)] + "…"
+                line += ": %s" % msg
+
+            lines.append(line)
 
 
 def show_xfailed(terminalreporter, lines):

testing/acceptance_test.py

@@ -865,7 +865,9 @@ class TestInvocationVariants(object):
                 _fail, _sep, testid = line.partition(" ")
                 break
         result = testdir.runpytest(testid, "-rf")
-        result.stdout.fnmatch_lines([line, "*1 failed*"])
+        result.stdout.fnmatch_lines(
+            ["FAILED test_doctest_id.txt::test_doctest_id.txt", "*1 failed*"]
+        )
 
     def test_core_backward_compatibility(self):
         """Test backward compatibility for get_plugin_manager function. See #787."""

testing/test_skipping.py

@@ -1208,6 +1208,6 @@ def test_summary_list_after_errors(testdir):
         [
             "=* FAILURES *=",
             "*= short test summary info =*",
-            "FAILED test_summary_list_after_errors.py::test_fail",
+            "FAILED test_summary_list_after_errors.py::test_fail: assert 0",
         ]
     )

testing/test_terminal.py

@@ -726,12 +726,18 @@ class TestTerminalFunctional(object):
         result.stdout.fnmatch_lines(["collected 3 items", "hello from hook: 3 items"])
 
 
-def test_fail_extra_reporting(testdir):
-    testdir.makepyfile("def test_this(): assert 0")
+def test_fail_extra_reporting(testdir, monkeypatch):
+    monkeypatch.setenv("COLUMNS", "80")
+    testdir.makepyfile("def test_this(): assert 0, 'this_failed' * 100")
     result = testdir.runpytest()
     assert "short test summary" not in result.stdout.str()
     result = testdir.runpytest("-rf")
-    result.stdout.fnmatch_lines(["*test summary*", "FAIL*test_fail_extra_reporting*"])
+    result.stdout.fnmatch_lines(
+        [
+            "*test summary*",
+            "FAILED test_fail_extra_reporting.py::test_this: AssertionError: this_failedthis…",
+        ]
+    )
 
 
 def test_fail_reporting_on_pass(testdir):