Documented declConflict errors (documentationjs#281)

* Documented declConflict errors

* Updated DeclConflict.md

Author: Woody88

errors/DeclConflict.md

@@ -1,21 +1,35 @@
 # `DeclConflict` Error
 
 ## Example
-
+Each of these pairs will fail with a DeclConflict error.
 ```purescript
-module ShortFailingExample where
+module Main where
+
+data T = Fail | Fail
+
+data T1 = Fail1
+data T2 = Fail1
 
-...
+class Fail2
+data T3 = Fail2
 ```
 
 ## Cause
 
-Explain why a user might see this error.
+This error occurs when a data constructor, type, or type class conflicts with another data constructor, type, or type class.
 
 ## Fix
+This can be fixed by using non-conflicting names or by putting conflicting names into a separate module. Then, if the names are later used together in a module they can be distinguished via a qualified import:
+```purescript
+module Main where
+
+import Module1 as Module1 -- includes: data Works = Works
+import Module2 as Module2 -- includes: data Works = Works
 
-- Suggest possible solutions.
+x :: Module1.Works
+x = Module1.Works
 
-## Notes
+y :: Module2.Works
+y = Module2.Works 
+```
 
-- Additional notes.