fix typo : StdClass should be stdClass with little "s"
minor #9288 fix typo : StdClass should be stdClass with little "s" (samsonasik)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #9288).

Discussion
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fix typo : StdClass should be stdClass with little "s"

Commits
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febd1d8 fix typo : StdClass should be stdClass with little "s"