Understanding the 'git blame' Command and Its Additional Information

The correct answer to the question on additional information that the 'git blame' command can show besides authorship reveals that it is: "The commit each line of a file was last modified in." In Git, the 'blame' command is not designed to point fingers at contributors but provides a potent way to check modification details about a file.

For every line in a given file, 'git blame' displays the last revision that the line was changed during. It's a helpful command when you need to track the origin of lines or changes in the code, especially in a collaborative environment where code has passed through multiple hands.

Practical Example of 'git blame'

To demonstrate, think of a case where you've received a bug report. The bug wasn't there in the last version of your software, and you're completely lost about where it might be coming from. This is where git blame shines.

Consider the command git blame filename. This will produce an output where each line of the 'filename' is annotated with the SHA-1 checksum, author, date and line number, paralleled with the related lines of code.

For instance, the output might look somewhat like this:

2065a9a5 (John Doe 2020-03-26 15:25:28 +0300 1) import React from 'react';
9068650d (Jane Doe 2020-07-10 10:18:42 +0300 2) import { useState } from 'react';

In this example, John Doe made the last change to the first line and Jane Doe made the last change to the second line. The string of characters before the parentheses (e.g., 2065a9a5 and 9068650d) are the commit hashes related with these changes.

Best Practices and Insights Related to 'git blame'

You can benefit most by understanding the 'git blame' command when debugging or trying to understand a piece of code that has had several revisions or modifications. Nevertheless, as responsible team members, you should remember that 'blame' is there to assist in tracking the history of the codebase and not to assign blame to someone for a deficiency.

For enhanced easiness or speed, you can use a GUI based tool that enables blame annotation, often in the form of clickable tooltips that open the commit the line was last changed in.

In summary, the git blame is a great tool to see the author and commit hash of the last modification of each line in a file. It aids greatly in diagnosing bugs and understanding the evolution of code. It is, however, not a tool for shaming team members but a diagnostic one that enables effective team collaboration.