reorder doc intro

Author: chris-martin

readme.md

@@ -1,15 +1,13 @@
 # Unfork
 
-“Unfork” is the opposite of “fork”; whereas forking allows things to run concurrently, unforking prevents things from running concurrently.
+“Unfork” is the opposite of “fork”; whereas forking allows things to run concurrently, unforking prevents things from running concurrently. Use one of the functions in the `Unfork` module when you have an action that will be used by concurrent threads but needs to run serially.
 
 |             | Result available   | Result discarded   |
 | ----------- | ------------------ | ------------------ |
 | Async I/O   | `unforkAsyncIO`    | `unforkAsyncIO_`   |
 | Async STM   | `unforkAsyncSTM`   | `unforkAsyncSTM_`  |
 | Sync I/O    | `unforkSyncIO`     | `unforkSyncIO_`    |
 
-Use one of the functions in the `Unfork` module when you have an action that will be used by concurrent threads but needs to run serially.
-
 
 ## Example
 

unfork/Unfork.hs

@@ -1,6 +1,6 @@
 {- |
 
-“Unfork” is the opposite of “fork”; whereas forking allows things to run concurrently, unforking prevents things from running concurrently.
+“Unfork” is the opposite of “fork”; whereas forking allows things to run concurrently, unforking prevents things from running concurrently. Use one of the functions in this module when you have an action that will be used by concurrent threads but needs to run serially.
 
 +-----------+------------------+-------------------+
 |           | Result available | Result discarded  |
@@ -12,8 +12,6 @@
 | Sync I/O  | 'unforkSyncIO'   | 'unforkSyncIO_'   |
 +-----------+------------------+-------------------+
 
-Use one of the functions in this module when you have an action that will be used by concurrent threads but needs to run serially.
-
 
 == Example