Make -r letters "f" and "F" aliases

As far as the output is concerned, they are both identical so it doesn't
make sense to have both.

setup, teardown, and collect failures are already reported as "errors", "E".

src/_pytest/terminal.py

@@ -173,6 +173,9 @@ def getreportopt(config: Config) -> str:
     elif config.option.disable_warnings and "w" in reportchars:
         reportchars = reportchars.replace("w", "")
     for char in reportchars:
+        # f and F are aliases
+        if char == "F":
+            char = "f"
         if char == "a":
             reportopts = "sxXwEf"
         elif char == "A":
@@ -185,19 +188,16 @@ def getreportopt(config: Config) -> str:
 
 @pytest.hookimpl(trylast=True)  # after _pytest.runner
 def pytest_report_teststatus(report: TestReport) -> Tuple[str, str, str]:
+    letter = "F"
     if report.passed:
         letter = "."
     elif report.skipped:
         letter = "s"
-    elif report.failed:
-        letter = "F"
-        if report.when != "call":
-            letter = "f"
 
-    # Report failed CollectReports as "error" (in line with pytest_collectreport).
     outcome = report.outcome
-    if report.when == "collect" and outcome == "failed":
+    if report.when in ("collect", "setup", "teardown") and outcome == "failed":
         outcome = "error"
+        letter = "E"
 
     return outcome, letter, outcome.upper()
 
@@ -988,7 +988,6 @@ class TerminalReporter:
             "x": show_xfailed,
             "X": show_xpassed,
             "f": partial(show_simple, "failed"),
-            "F": partial(show_simple, "failed"),
             "s": show_skipped,
             "S": show_skipped,
             "p": partial(show_simple, "passed"),

testing/test_terminal.py

@@ -754,6 +754,18 @@ class TestTerminalFunctional:
         result = testdir.runpytest(*params)
         result.stdout.fnmatch_lines(["collected 3 items", "hello from hook: 3 items"])
 
+    def test_summary_f_alias(self, testdir):
+        testdir.makepyfile(
+            """
+            def test():
+                assert False
+            """
+        )
+        result = testdir.runpytest("-rfF")
+        expected = "FAILED test_summary_f_alias.py::test - assert False"
+        result.stdout.fnmatch_lines([expected])
+        assert result.stdout.lines.count(expected) == 1
+
 
 def test_fail_extra_reporting(testdir, monkeypatch):
     monkeypatch.setenv("COLUMNS", "80")
@@ -1685,12 +1697,16 @@ class TestProgressWithTeardown:
         testdir.makepyfile(
             """
             def test_foo(fail_teardown):
-                assert False
+                assert 0
         """
         )
-        output = testdir.runpytest()
+        output = testdir.runpytest("-rfE")
         output.stdout.re_match_lines(
-            [r"test_teardown_with_test_also_failing.py FE\s+\[100%\]"]
+            [
+                r"test_teardown_with_test_also_failing.py FE\s+\[100%\]",
+                "FAILED test_teardown_with_test_also_failing.py::test_foo - assert 0",
+                "ERROR test_teardown_with_test_also_failing.py::test_foo - assert False",
+            ]
         )
 
     def test_teardown_many(self, testdir, many_files):