Multiple entries seems to fail

[daobrien]

If you add two identical abbreviations via the IRC client, but with different definitions, it seems only the latest one is honored.

davido> !toc
<acrobot>  Sorry, no definition for toc
<davido> !TOC=Theory of Constraints @proj-management
<acrobot>  Thanks! [TOC=Theory of Constraints @proj-management]
<davido> !toc
<acrobot> TOC: Theory of Constraints @proj-management
<davido> !TOC=Table of Contents @documentation
<acrobot>  Thanks! [TOC=Table of Contents @documentation]
<davido> !toc
<acrobot> TOC: Table of Contents @documentation
<davido> !TOC=Theory of Constraints @proj-management
<acrobot>  Thanks! [TOC=Theory of Constraints @proj-management]
<davido> !toc
<acrobot> TOC: Theory of Constraints @proj-management

It should accept and display both.