The source file is edited while both are open - The destination file update.
What is source file?
A source file is a file containing source code that is used to create an executable program. It is the human-readable text of a computer program that is written using a programming language, such as C++, Java, or Python. Source files are the fundamental building blocks of computer programs. They contain all the instructions necessary to turn a program into a working application. The code in a source file is written in a language that is understood by a compiler, which is a program that translates the code into a language that can be understood by a computer. Once a program has been compiled, it can be executed on a computer.
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