While the look of source code isn’t related to how it actually performs, it can still matter to developers. The use of proper formatting, such as spacing, indentation, and capitalization, can make a software program easier (or, at least, more pleasant) to read and, hence, understand. Many programmers think that better looking code is higher quality code.
“... in order to have good code, it is necessary for the code to be well formatted, obeying conventions and not a big incoherent mess.” Tom Hawtin - tackline
“The very first thing, before I even start reading the code would be code indentation.” Michał Piaskowski
“Code that looks beautiful is almost always of superior quality; logically it shouldn't be, but it is.” Keith Williams