docs(encoder): correct the multi-line string claim

Assisted-by: DeepSeek V4.1 Flash

interpres.go

@@ -261,14 +261,14 @@ func MarshalContext(ctx context.Context, v any) ([]byte, error) {
 
 // An Encoder encodes Go values into TOML.
 //
-// All options default to behaviour that preserves byte-for-byte compatibility
-// with previous releases and passes the toml-test compliance suite:
+// All options default to the behaviour earlier releases used, and the defaults
+// pass the toml-test compliance suite in both directions:
 //
 //	GroupByKind:        true  (scalars first, then tables, then arrays of tables)
 //	OmitEmptyArrays:    false (a nil/empty []string slice emits [] as a value;
 //	                          a nil/empty []Item struct slice is still skipped)
-//	LiteralMultilineAt: 0     (always emit basic multi-line strings with
-//	                          escape sequences, never literal ones)
+//	LiteralMultilineAt: 0     (always emit the escaped basic form, never a
+//	                          literal one)
 //
 // Use the chainable option methods to opt out. The option state is private;
 // callers that need the underlying knobs reach for the methods rather than