Updated SC2059 (markdown)

SC2059.md

@@ -31,15 +31,17 @@ The second writes ``bash: printf: `\': invalid format character``
 Sometimes you may actually want to interpret data as a format string, like in:
 
 ```sh
-hexToAscii() { printf "\x$1"; }
-hexToAscii 21
+octToAscii() { printf "\\$1"; }
+octToAscii 130
 ```
 
-or when you have a pattern in a variable:
+In Bash, Ksh and BusyBox, there's a `%b` format specifier that expands escape sequences without interpreting other format specifiers: `printf '%b' "\\$1"`. In POSIX, you can instead [[ignore]] this warning.
+
+Other times, you might have a pattern in a variable:
 
 ```sh
 filepattern="file-%d.jpg"
 printf -v filename "$filepattern" "$number"
 ```
 
-These are valid use cases with no useful rewrites. Please [[ignore]] the warnings with a [[directive]].
+This has no good rewrite. Please [[ignore]] the warning with a [[directive]].