Some issues in 'func_before'

[KaiHuangNIPC]

Hello, I found some errors in "MSR_data_cleaned.csv".
You may have used diff func_before and func_after to get lines_before and lines_after, but due to incorrect indentation of func_before you get wrong lines_before and lines_after.

For example: <Num: 10897, CVE-ID: CVE-2017-0402>
lines_before: p->status = -EINVAL; is redundant.