Update function visibility example

Two functions don't access state and should be `pure`. Also, inconsistent spacing when using arithmetic.

1 files changed, 2 insertions, 2 deletions

diff --git a/docs/contracts.rst b/docs/contracts.rst
index a083b9e9..fa6b4564 100644
--- a/docs/contracts.rst
+++ b/docs/contracts.rst
@@ -194,10 +194,10 @@ In the following example, ``D``, can call ``c.getData()`` to retrieve the value
     contract C {
         uint private data;
 
-        function f(uint a) private returns(uint b) { return a + 1; }
+        function f(uint a) private pure returns(uint b) { return a + 1; }
         function setData(uint a) public { data = a; }
         function getData() public returns(uint) { return data; }
-        function compute(uint a, uint b) internal returns (uint) { return a+b; }
+        function compute(uint a, uint b) internal pure returns (uint) { return a + b; }
     }
 
     contract D {