Style is an often overlooked but very critical attribute of writing. The style of writing directly impacts the readability and understandability of the end product.
Ada 95 Quality and Style: Guidelines for Professional Programmers. SPC-94093-CMC. Herndon, Virginia. p-1.
Code style or standards form a consistent, yet flexible, set of "best practices" designed to improve quality and readability while making code changes and maintenance easier.
Every line of code should appear to be written by a single person, no matter the number of contributors.
If a file already has a consistent style, use that style rather than introducing inconsistencies.