pr is as specified in the Single UNIX Specification but with differences as listed below.
The behaviors specified in this section are expected to disappear from a future version of the LSB; applications should only use the non-LSB-deprecated behaviors.
has unspecified behavior.
uses hat notation (^G) and octal backslash notation.
merges full lines, turns off -W line truncation, no column alignment.
starts counting with NUMBER at 1st line of first page printed.
separates columns by an optional STRING, doesn't use -S "STRING", -S only: No separator used without -S.
omits page headers and trailers, eliminates any pagination by form feeds set in input files.
uses octal backslash notation.
sets page width to PAGE_WIDTH (72) characters always, truncates lines, except -J option is set, no interference with -S or -s.
displays this help and exits.
outputs version information and exits.