Fix the comma splice in the sentence.
He ate his dinner, he had promised himself he wouldn’t.
He ate his dinner even though he had promised himself he wouldn't.
Complete the following task based on the instruction and optional input provided.### Instruction:
Fix the comma splice in the sentence.

### Input:
He ate his dinner, he had promised himself he wouldn’t.

### Output:
He ate his dinner even though he had promised himself he wouldn't.