Here is a free cover letter, the format is block style. A block style letter does not indent paragraph, instead they are separated by blank lines.
Paragraph symbols have been inserted to allow the user to see how many lines have been skipped. Needless to say, they should be deleted before the letter would be used. In Microsoft Word, the paragraph symbols are an option that can click be clicked on and off. Unfortunately, Google Docs does not have that option at this point.