The other half of Issue #1580: use short float repr where possible.

Addresses the float -> string conversion, using David Gay's code which
was added in Mark Dickinson's checkin r71663.

Also addresses these, which are intertwined with the short repr
changes:

- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'
- Issue #5515: 'n' formatting with commas no longer works poorly
    with leading zeros.
- PEP 378 Format Specifier for Thousands Separator: implemented
    for floats.

1 files changed, 5 insertions, 0 deletions

diff --git a/Lib/test/test_format.py b/Lib/test/test_format.py
index c90f66d..054baf6 100644
--- a/Lib/test/test_format.py
+++ b/Lib/test/test_format.py
@@ -220,6 +220,11 @@ class FormatTest(unittest.TestCase):
         testformat("%a", "\u0378", "'\\u0378'")  # non printable
         testformat("%r", "\u0374", "'\u0374'")   # printable
         testformat("%a", "\u0374", "'\\u0374'")  # printable
+
+        # alternate float formatting
+        testformat('%g', 1.1, '1.1')
+        testformat('%#g', 1.1, '1.10000')
+
         # Test exception for unknown format characters
         if verbose:
             print('Testing exceptions')