Tyler refactor debuglog#3

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TylerYang wants to merge 2 commits intotargos:fix-17605from

TylerYang:tyler-refactor-debuglog

Commits on Dec 11, 2017

util: refactor debuglog() from array regex to regex string
tyler
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Commits on Dec 12, 2017

doc: updated wildcard debuglog example on util
tyler
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