ZSTD_SequenceCopier_f no returns the nb of bytes consumed from input

which feels much more natural

lib/zstd.h

@@ -1561,8 +1561,8 @@ ZSTDLIB_STATIC_API size_t ZSTD_decompressionMargin(const void* src, size_t srcSi
     ))
 
 typedef enum {
-  ZSTD_sf_noBlockDelimiters = 0,         /* Representation of ZSTD_Sequence has no block delimiters, sequences only */
-  ZSTD_sf_explicitBlockDelimiters = 1    /* Representation of ZSTD_Sequence contains explicit block delimiters */
+  ZSTD_sf_noBlockDelimiters = 0,         /* ZSTD_Sequence[] has no block delimiters, just sequences */
+  ZSTD_sf_explicitBlockDelimiters = 1    /* ZSTD_Sequence[] contains explicit block delimiters */
 } ZSTD_SequenceFormat_e;
 #define ZSTD_sequenceFormat_e ZSTD_SequenceFormat_e /* old name */