The traditional beautifier indent, available on every Unix machine. The version found on some is GNU indent, which can be compiled and installed on every machine. GNU indent can read a set of rules from the file ~/.indent.pro, for instance:

--original --dont-format-first-column-comments --no-blank-lines-after-commas --parameter-indentation 8 --indent-level 8 --line-length 85 --no-space-after-parentheses --no-comment-delimiters-on-blank-lines 

So, just running indent before commiting guarantees uniformity of the presentation. If you want to enforce it, define a pre-commit hook in the Version Control System you use, which will run indent and refuse the commit if the committed version differs from what indent produces.