0 flag, the value is unsigned, otherwise signed.
In output, the precision (or sizeof(long) whatever is less) least
significant bytes of the value are sign extended or zero extended
(depending on the 0 flag) to width bytes.
+The default for precision is 1. Thus if you do not specify
+the precision, only the least significant byte is written!
+It is common error to write out "%2r"; instead of out "%.2r";.
In input, width bytes are read and put into the value.
@@ -380,7 +383,7 @@ the value is sign extended or zero extended, depending on the
0 flag.
-Example: out "%.2r"
+Examples: out "%.2r"; in "%02r";