py: Fix pfenv_print_strn to return correct number of chars printed.

With this fix, all tests in tests/basics pass on pyboard.

1 files changed, 1 insertions, 1 deletions

diff --git a/stmhal/printf.c b/stmhal/printf.c
index b1eace28d..ea90f4980 100644
--- a/stmhal/printf.c
+++ b/stmhal/printf.c
@@ -244,7 +244,7 @@ void strn_print_strn(void *data, const char *str, unsigned int len) {
     strn_pfenv->cur += len;
     strn_pfenv->remain -= len;
 }
-    
+
 int vsnprintf(char *str, size_t size, const char *fmt, va_list ap) {
     strn_pfenv_t strn_pfenv;
     strn_pfenv.cur = str;