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Update wikipage Managing CTRL+C in console application. (Signed-off-by:tioui).

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documentation/18.01/eiffel/Tutorials/Mini-HowTo/Managing-CTRL-C-on-console.wiki
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[[Property:uuid|5CA34C5D-30F1-4D6F-9FE4-B555E541EA8C]]
[[Property:weight|4000]]
[[Property:title|Managing CTRL+C in console application]]
[[Property:link_title|CTRL_C console]]
Normally, if the user use the CTRL+C keys, the Eiffel application detect it as an error and throw an exception of type <code>OPERATING_SYSTEM_SIGNAL_FAILURE</code>.
To manage the CTRL+C keys, you can use a <code>rescue</code> clause to detect the exception and a <code>retry</code> mecanism to cancel the exception handeling done by the Eiffel runtime.