Changes

 #To introduce a little terminology, the .hg directory is the “real” repository, and all of the files and directories that coexistwith it are said to live in the ''working directory''. An easy way to remember the distinction is that the ''repository '' containsthe history of your project, while the ''working directory '' contains a snapshot of your project at a particular point in history.#The ''hg log'' command gives us a view of the history of changes in the repository. By default, this command prints a brief paragraph of output for each change to the project that was recorded. Each of these recorded events are called a ''changeset'', because it can contain a record of changes to several files.#Some changesets, have a tag field. A ''tag'' is another way to identify a changeset, by giving it an easy-to-remember name.