Merge branch 'jc/coding-guidelines'

* jc/coding-guidelines: CodingGuidelines: avoid "test <cond> -a/-o <cond>" CodingGuidelines: on splitting a long line CodingGuidelines: on comparison CodingGuidelines: do not call the conditional statement "if()" CodingGuidelines: give an example for shell function preamble CodingGuidelines: give an example for control statements CodingGuidelines: give an example for redirection CodingGuidelines: give an example for case/esac statement CodingGuidelines: once it is in, it is not worth the code churn