Add input/output sections to the cabal description.

diff --git a/email-validator.cabal b/email-validator.cabal
index acb9fcaea8e6616408e8b0a41367e2fbe8cd93f3..5efa913fd15bea7b41538b3a44e201269d543f4e 100644 (file)
--- a/email-validator.cabal
+++ b/email-validator.cabal
@@ -34,6 +34,16 @@ description:
   @
   $ email-validator -i addresses.csv +RTS -N25
   @
+  .
+  /Input/
+  .
+  The @input@ file (default: stdin) should be a list of email addresses,
+  one per line. Empty lines will be ignored.
+  .
+  /Output/
+  .
+  Valid email addresses will be written to the output file (default:
+  stdout), one per line.
 
 
 executable email-validator