For example, a chapter, or a whole document. Courier fonts have equal width letters which make it easy to control the number of characters per line. These font and margin settings will make lines about 65 characters maximum in length. This does a good job of preventing orphans. These are quote marks which point to the right at the start of a quoted section, and to the left at the end.
Apostrophes also point left.
In Word and other word processing programs, these are active by default. Saving the file as 'MS-DOS Text with Line Breaks' fixes many problems. Only' or 'Text Only with Line Breaks' won't work because it replaces smart quotes with accented letters. They should be replaced with a space or the nearest equivalent US standard keyboard character. Tabbed paragraph indents often get lost in email, becoming either too few or too many spaces in the received email.