make fix_decimal_and_space_to_ascii check if it modifies the string
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 6979050..034c691 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -8845,6 +8845,7 @@
const int kind = PyUnicode_KIND(self);
void *data = PyUnicode_DATA(self);
Py_UCS4 maxchar = 0, ch, fixed;
+ int modified = 0;
Py_ssize_t i;
for (i = 0; i < len; ++i) {
@@ -8859,6 +8860,7 @@
fixed = '0' + decimal;
}
if (fixed != 0) {
+ modified = 1;
if (fixed > maxchar)
maxchar = fixed;
PyUnicode_WRITE(kind, data, i, fixed);
@@ -8870,7 +8872,7 @@
maxchar = ch;
}
- return maxchar;
+ return (modified) ? maxchar : 0;
}
PyObject *