The read syntax for strings is a double-quote, an arbitrary number of
characters, and another double-quote, "like this". To include a
double-quote in a string, precede it with a backslash; thus, "\""
is a string containing just a single double-quote character. Likewise,
you can include a backslash by preceding it with another backslash, like
this: "this \\ is a single embedded backslash".
The newline character is not special in the read syntax for strings; if you write a new line between the double-quotes, it becomes a character in the string. But an escaped newline--one that is preceded by `\'---does not become part of the string; i.e., the Lisp reader ignores an escaped newline while reading a string. An escaped space `\ ' is likewise ignored.
"It is useful to include newlines
in documentation strings,
but the newline is \
ignored if escaped."
=> "It is useful to include newlines
in documentation strings,
but the newline is ignored if escaped."
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