Question

correct any errors in capitalization or punctuation. your answer should be a single sentence.
\i regret that we cannot publish your article\, wrote the editor-in-chief after i sent in my manuscript.
\i regret that we cannot publish your article\, wrote the editor-in-chief after i sent in my manuscript.

Explanation:

The error is in the punctuation of the quoted sentence. When a direct quote is followed by a tag like "wrote the editor-in-chief", the comma inside the closing quotation mark should be a period, and the comma after the quote should be inside the quotation marks (American English standard, which is standard for this type of writing).

Answer:

"I regret that we cannot publish your article," wrote the editor-in-chief after I sent in my manuscript.