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docs/markdown/snippets/more-escape-sequences.md

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+## String escape character update
+
+The strings (both single-quoted and triple-quoted) in meson has been taught the
+same set of escape sequences as in Python. It is therefore now possible to use
+arbitrary bytes in strings, like for example NUL (`\0`) and other ASCII control
+characters. See the chapter about *Strings* in *Syntax* for more details.
+
+Potential backwards compatibility issue: Any valid escape sequence according to
+the new rules will be interpreted as an escape sequence instead of the literal
+characters. Previously only single-quote strings supported escape sequences and
+the supported sequences were `\'`, `\\` and `\n`.
+
+The most likely breakage is usage of backslash-n in triple-quoted strings. It
+is now written in the same way as in single-quoted strings: `\\n` instead of
+`\n`. In general it is now recommended to escape any usage of backslash.
+However, backslash-c (`\c`), for example, is still backslash-c because it isn't
+a valid escape sequence.