Support "Smart Dashes" (emdash) in kubectl commands

[tantalic]

We manage all k8s objects in namespaces which this bot does not account for:

!kubectl get pods —namespace=slackbots

Results in:

Error from server: pods "—namespace=slackbots" not found

[dkapanidis]

In Slack the double dashes are being transformed automatically to to different characters. You need to disable this feature (Smart Dashes) from the Slack UI.

Right click on the message textbox and uncheck Smart Dashes.

[tantalic]

@Spiddy that is certainly the cause of the issue and adjusting that setting does fix the issue for that particular user.

Given this is the default setting on OS X, I think it would make sense to detect and transform back to double dashes for !kubectl commands.