Added documentation of backslash ending string literals.
Closes
@@ -302,7 +302,7 @@ nonzero_dec: '1' | '2' | '3' | '4'
A _character literal_ is a single Unicode character enclosed within two
`U+0027` (single-quote) characters, with the exception of `U+0027` itself,
-which must be _escaped_ by a preceding U+005C character (`\`).
+which must be _escaped_ by a preceding `U+005C` character (`\`).
##### String literals
@@ -311,6 +311,19 @@ A _string literal_ is a sequence of any Unicode characters enclosed within two
which must be _escaped_ by a preceding `U+005C` character (`\`), or a _raw
string literal_.
+A multi-line string literal may be defined by terminating each line with a
+`U+005C` character (`\`) immediately before the newline. This causes the
+`U+005C` character, the newline, and all whitespace at the beginning of the
+next line to be ignored.
+
+```rust
+let a = "foobar";
+let b = "foo\
+ bar";
+```
+
+`a` is equivalent to `b`.
+
##### Character escapes
Some additional _escapes_ are available in either character or non-raw string
