$SHORT_DOC echo [-neE] [arg ...]
Write arguments to the standard output.
-Display the ARGs on the standard output followed by a newline.
+Display the ARGs, separated by a single space character and followed by a
+newline, on the standard output.
Options:
-n do not append a newline
\b backspace
\c suppress further output
\e escape character
+ \E escape character
\f form feed
\n new line
\r carriage return