What is 'patch'?

[guoweijun137]

In https://github.com/Ultimanecat/DefectRepairing/blob/aa519d52773ed6cf8a6273b67dfefa066f9f9ee5/tool/source/run.py#L14,I don't know what the implementation of the command "patch" is and I fail to find it in Defects4j.Could you tell me where the implementation of the command “patch” is?

[xiongyingfei]

It is not clear what command you were referring to. There is a standard Linux command "patch", if it is what you asked.