Ruby Code Linting and Auto-formatting with RuboCop

Linting is the automated detection of programmatic and stylistic errors in source code. A static code analysis tool known as a linter performs this checking. A code formatter, on the other hand, is a tool that is concerned with formatting source code so that it strictly follows a pre-configured set of rules. A linter will typically report violations, but it is usually up to the programmer to resolve the issue, whereas a code formatter applies its rules directly to the source code, automatically correcting formatting errors.