Add an additional and different example of correct syntax using ANSI-C quoting.

SC1012.md

@@ -29,6 +29,14 @@ line="foo
 bar"
 ```
 
+or
+
+```sh
+# Linefeed using ANSI-C quoting
+line=$'foo\nbar'
+```
+
+
 ### Rationale:
 
 ShellCheck has found a `\t`, `\n` or `\r` in a context where they just become regular letters `t`, `n` or `r`. Most likely, it was intended as a tab, linefeed or carriage return.