bpo-33718: regrtest: enhance "running:" formatting (GH-7292)

* "running:" progress: Format number of seconds as hours and minutes
* format_duration(): count also minutes as hours
* Create Lib/test/libregrtest/utils.py

Lib/test/libregrtest/utils.py

@@ -0,0 +1,47 @@
+import os.path
+import textwrap
+
+
+def format_duration(seconds):
+    if seconds < 1.0:
+        return '%.0f ms' % (seconds * 1e3)
+    if seconds < 60.0:
+        return '%.0f sec' % seconds
+
+    minutes, seconds = divmod(seconds, 60.0)
+    hours, minutes = divmod(minutes, 60.0)
+    if hours:
+        return '%.0f hour %.0f min' % (hours, minutes)
+    else:
+        return '%.0f min %.0f sec' % (minutes, seconds)
+
+
+def removepy(names):
+    if not names:
+        return
+    for idx, name in enumerate(names):
+        basename, ext = os.path.splitext(name)
+        if ext == '.py':
+            names[idx] = basename
+
+
+def count(n, word):
+    if n == 1:
+        return "%d %s" % (n, word)
+    else:
+        return "%d %ss" % (n, word)
+
+
+def printlist(x, width=70, indent=4, file=None):
+    """Print the elements of iterable x to stdout.
+
+    Optional arg width (default 70) is the maximum line length.
+    Optional arg indent (default 4) is the number of blanks with which to
+    begin each line.
+    """
+
+    blanks = ' ' * indent
+    # Print the sorted list: 'x' may be a '--random' list or a set()
+    print(textwrap.fill(' '.join(str(elt) for elt in sorted(x)), width,
+                        initial_indent=blanks, subsequent_indent=blanks),
+          file=file)