Add a POSIX solution without a subshell

SC2013.md

@@ -27,6 +27,17 @@ do
 done < <(grep -v '^ *#' < file)
 ```
 
+or without a subshell, with a pipe (more portable, but write a file on the filesystem):
+
+```sh
+mkfifo mypipe
+while IFS= read -r line
+do
+  echo "Line: $line"
+done < mypipe
+rm mypipe
+```
+
 ### Rationale:
 
 For loops by default (subject to `$IFS`) read word by word. Additionally, glob expansion will occur.