Fix bug in _insert_thousands_sep: too much zero padding could be
added for 'n' formats with non-repeating thousands-separator.
diff --git a/Lib/decimal.py b/Lib/decimal.py
index 55589ad..dc38167 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -5621,8 +5621,6 @@
groups = []
for l in _group_lengths(grouping):
- if groups:
- min_width -= len(sep)
if l <= 0:
raise ValueError("group length should be positive")
# max(..., 1) forces at least 1 digit to the left of a separator
@@ -5632,6 +5630,7 @@
min_width -= l
if not digits and min_width <= 0:
break
+ min_width -= len(sep)
else:
l = max(len(digits), min_width, 1)
groups.append('0'*(l - len(digits)) + digits[-l:])