Allow -R4:3 instead of -R4:3: -- I never use the 3rd arg.

diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index 3f9faaeb68f603b94d1f3223a7457e4f77d09739..6e6bb73e2ae6564432b0909676b951b88317bb7f 100755 (executable)
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -70,7 +70,7 @@ be of the form stab:run:fname where 'stab' is the number of times the
 test is run to let gettotalrefcount settle down, 'run' is the number
 of times further it is run and 'fname' is the name of the file the
 reports are written to.  These parameters all have defaults (5, 4 and
-"reflog.txt" respectively), so the minimal invocation is '-R ::'.
+"reflog.txt" respectively), and the minimal invocation is '-R :'.
 
 -M runs tests that require an exorbitant amount of memory. These tests
 typically try to ascertain containers keep working when containing more than
@@ -264,19 +264,19 @@ def main(tests=None, testdir=None, verbose=0, quiet=False, generate=False,
             coverdir = None
         elif o in ('-R', '--huntrleaks'):
             huntrleaks = a.split(':')
-            if len(huntrleaks) != 3:
+            if len(huntrleaks) not in (2, 3):
                 print(a, huntrleaks)
-                usage('-R takes three colon-separated arguments')
-            if len(huntrleaks[0]) == 0:
+                usage('-R takes 2 or 3 colon-separated arguments')
+            if not huntrleaks[0]:
                 huntrleaks[0] = 5
             else:
                 huntrleaks[0] = int(huntrleaks[0])
-            if len(huntrleaks[1]) == 0:
+            if not huntrleaks[1]:
                 huntrleaks[1] = 4
             else:
                 huntrleaks[1] = int(huntrleaks[1])
-            if len(huntrleaks[2]) == 0:
-                huntrleaks[2] = "reflog.txt"
+            if len(huntrleaks) == 2 or not huntrleaks[2]:
+                huntrleaks[2:] = ["reflog.txt"]
         elif o in ('-M', '--memlimit'):
             test_support.set_memlimit(a)
         elif o in ('-u', '--use'):