ocr: Branch to the :: command with the given label if any S commands made any substitutions since the most recent read of an input line or execution of a t or T. If no label is given, branch to the end of the script. Branch to the : command with the given label if no S commands have succeeded since the last input line or t or T command. Branch to the end of the script if no label is given. Write the current text buffer to wfile. If no wfile is given standard output is used. Write the first line of the current text buffer to wfile. Ifno wfile is given standard output is used. Exchange the contents o ...