Jan 12
Writing the following preference makes Xcode place the opening brackets according to the Allman style (which is the easiest on the eyes IMHO) for the if block text macro:
$ defaults write com.apple.Xcode XCCodeSenseFormattingOptions '{ "BlockSeparator" = "\n" ; }'
Saved for future reference. Found here: Hidden Xcode build, debug and template settings.
