Replace the Latin abbreviation "cf." in comments.

include/btr0sea.h

@@ -160,7 +160,7 @@ struct btr_search_struct{
 				number of full fields */
 	ulint	n_bytes;	/* recommended prefix: number of bytes in
 				an incomplete field;
-				cf. BTR_PAGE_MAX_REC_SIZE */
+				see also BTR_PAGE_MAX_REC_SIZE */
 	ibool	left_side;	/* TRUE or FALSE, depending on whether
 				the leftmost record of several records with
 				the same prefix should be indexed in the

include/data0type.ic

@@ -65,8 +65,8 @@ dtype_get_mblen(
 		innobase_get_cset_width(dtype_get_charset_coll(prtype),
 					mbminlen, mbmaxlen);
 		ut_ad(*mbminlen <= *mbmaxlen);
-		ut_ad(*mbminlen <= 2); /* cf. the bit-field in dtype_t */
-		ut_ad(*mbmaxlen < 1 << 3); /* cf. the bit-field in dtype_t */
+		ut_ad(*mbminlen <= 2); /* mbminlen in dtype_t is 0..3 */
+		ut_ad(*mbmaxlen < 1 << 3); /* mbmaxlen in dtype_t is 0..7 */
 #else /* !UNIV_HOTBACKUP */
 		ut_a(mtype <= DATA_BINARY);
 		*mbminlen = *mbmaxlen = 1;

include/univ.i

@@ -87,7 +87,8 @@ operations (very slow); also UNIV_DEBUG must be defined */
 						rw-locks and mutexes */
 #define UNIV_SEARCH_PERF_STAT			/* statistics for the
 						adaptive hash index */
-#define UNIV_SRV_PRINT_LATCH_WAITS		/* cf. sync0sync.c */
+#define UNIV_SRV_PRINT_LATCH_WAITS		/* enable diagnostic output
+						in sync0sync.c */
 #define UNIV_BTR_PRINT				/* enable functions for
 						printing B-trees */
 #endif