py: Make form-feed character a space (following C isspace).
Eg, in CPython stdlib, email/header.py has a form-feed character.
diff --git a/py/unicode.c b/py/unicode.c
index a20527c..4bdf033 100644
--- a/py/unicode.c
+++ b/py/unicode.c
@@ -22,7 +22,7 @@
// table of attributes for ascii characters
STATIC const uint8_t attr[] = {
0, 0, 0, 0, 0, 0, 0, 0,
- 0, AT_SP, AT_SP, AT_SP, 0, AT_SP, 0, 0,
+ 0, AT_SP, AT_SP, AT_SP, AT_SP, AT_SP, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
AT_SP, AT_PR, AT_PR, AT_PR, AT_PR, AT_PR, AT_PR, AT_PR,