Allow global var assignment to count as a read #83
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Typically when a variable is assigned a value within a scope, and then never used for any other purpose, it triggers an unused variable warning in this sniff. However, when the
global
keyword is used to import a variable into the scope, an assignment is a side-effect and therefore should count as using the variable (this is the same as the behavior of pass-by-reference). This PR fixesprocessScopeCloseForVariable()
to support that behavior.Fixes #81