git-diff:tldr:f5c0c

The command "git diff ${branch}:${filename2} ${filename}" compares the differences between two versions of a file in a Git repository.

Here's how to interpret each part of the command:

• "git diff": This is the Git command used to view the differences between files or commits.
• "${branch}:${filename2}": It refers to a specific version of a file, denoted by the branch name followed by the file name. The command compares this version with another file.
• ${branch}: It is a placeholder for the name of the branch where the file resides.
• ${filename2}: It is a placeholder for the name of the file being compared (in a specific branch).
• "${filename}": It is another placeholder for the name of the file being compared (outside the given branch).

Putting it together, this command compares the differences between the file at ${branch}:${filename2} (a specific version of a file in a branch) and ${filename} (a file outside that branch). It shows the changes made between the two versions, including added, modified, or deleted lines.