*: bb_error_msg's messages should not be capitalized

diff --git a/util-linux/mkfs_vfat.c b/util-linux/mkfs_vfat.c
index 72c2058..98a0895 100644
--- a/util-linux/mkfs_vfat.c
+++ b/util-linux/mkfs_vfat.c
@@ -273,10 +273,10 @@
 			device_num == 0x0d00 || // xd
 			device_num == 0x1600 )  // hdc, hdd
 		)
-			bb_error_msg_and_die("Will not try to make filesystem on full-disk device (use -I if wanted)");
+			bb_error_msg_and_die("will not try to make filesystem on full-disk device (use -I if wanted)");
 		// can't work on mounted filesystems
 		if (find_mount_point(device_name, NULL))
-			bb_error_msg_and_die("Can't format mounted filesystem");
+			bb_error_msg_and_die("can't format mounted filesystem");
 #endif
 		// get true sector size
 		// (parameter must be int*, not long* or size_t*)
@@ -562,7 +562,7 @@
 		start_data_sector = (reserved_sect + NUM_FATS * sect_per_fat) * (bytes_per_sect / SECTOR_SIZE);
 		start_data_block = (start_data_sector + SECTORS_PER_BLOCK - 1) / SECTORS_PER_BLOCK;
 
-		bb_info_msg("Searching for bad blocks ");
+		bb_info_msg("searching for bad blocks ");
 		currently_testing = 0;
 		try = TEST_BUFFER_BLOCKS;
 		while (currently_testing < volume_size_blocks) {
@@ -577,7 +577,7 @@
 			if (got < 0)
 				got = 0;
 			if (got & (BLOCK_SIZE - 1))
-				bb_error_msg("Unexpected values in do_check: probably bugs");
+				bb_error_msg("unexpected values in do_check: probably bugs");
 			got /= BLOCK_SIZE;
 			currently_testing += got;
 			if (got == try) {
@@ -592,7 +592,7 @@
 			for (i = 0; i < SECTORS_PER_BLOCK; i++) {
 				int cluster = (currently_testing * SECTORS_PER_BLOCK + i - start_data_sector) / (int) (sect_per_clust) / (bytes_per_sect / SECTOR_SIZE);
 				if (cluster < 0)
-					bb_error_msg_and_die("Invalid cluster number in mark_sector: probably bug!");
+					bb_error_msg_and_die("invalid cluster number in mark_sector: probably bug!");
 				MARK_CLUSTER(cluster, BAD_FAT32);
 			}
 			badblocks++;