better escape code support

LANGUAGE.md

@@ -37,7 +37,7 @@ roadmap and milestone history.
 - pointer-to-array `.len`, indexing, slicing, `.ptr` on slices and pointers-to-arrays, implicit address-taking for array-variable slices, and pointer/slice sentinel weakening
 - `ptrcast!(T, ptr)` as a first-pass pointer-child retype that preserves optionality, pointer kind, mutability, and sentinel shape
 - unsafe `constcast!(value)` for restoring mutability to pointers, optional pointers, and slices without changing their child type or shape
-- UTF-8 string literals as immutable pointers to static zero-terminated byte arrays, plus raw backtick multiline strings
+- UTF-8 string literals as immutable pointers to static zero-terminated byte arrays, supporting `\\`, `\"`, `\n`, `\r`, `\t`, `\0`, and `\xNN` escapes, plus raw backtick multiline strings
 - narrow immutable zero-terminated byte pointer/slice conversion to `*c_char` / `?*c_char` without general `u8`/`c_char` interchange
 - optionals with `null`, `orelse`, postfix `?`, conditional `if`/`while` unwraps, guarded unwraps, and left-to-right short-circuiting multi-unwraps
 - nominal distinct types with explicit scalar backing conversion during construction and explicit scalar backing extraction, native enums with optional explicit integer backing and explicit backing-to-scalar casts, contextual enum literals, and imported C enums as target-backed integer aliases