Add JavaScript Question on String Concatenation

khairalanam commented 8 months ago

Summary of changes

This PR adds a question to the JavaScript quiz on string concatenation.

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[x] This PR is for one of the available issues and is not a PR for an issue already assigned to someone else.
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khairalanam commented 8 months ago

Changes have been implemented.

khairalanam commented 8 months ago

Thank you :D