clear trailing spaces in src/strutil.c

src/strutil.c

@@ -129,6 +129,7 @@ str_get_buffer ()
     return result;
 }
 
+
 void
 str_release_buffer (struct str_buffer *buffer)
 {
@@ -159,6 +160,7 @@ static int
 _str_convert (str_conv_t coder, char *string, struct str_buffer *buffer)
 {
     int state;
+
     size_t left;
     size_t nconv;