Definitions for "Quoting"
Literally, to enclose selected text within some type of quotation marks. When applied to shell commands, quoting means to disable shell interpretation of special characters by enclosing the character within single or double quotes or by escaping the character.
In email or newsgroup posts it is common practice to "quote" from the item you are replying to. This can help the reader understand what points in the original you are responding to. Quotes are signalled by placing a character in front of the quoted line, most commonly a "". Some mail and news packages do this for you automatically. If you quote a quoted reply, this ends up with two characters in front e.g. What's the terminal velocity of a swallow? African or European? African, When quoting, only quote selected parts that are relevant. If nothing from the original is relevant, then don't quote anything. That way you avoid getting flamed for me too posts.
A mechanism that is used to control the substitution of special characters. Special characters enclosed in single quotes are not replaced by their meaning, but remain embedded in the text when the quotes are stripped off. Double quotes are used to prevent the expansion of all special characters except ``$'', ``\'' and ```''.
Keywords:  exact, repeating, someone, words
Repeating the exact words used by someone else.