ui-blame: Distinguish hashes column from lines column

Signed-off-by: Jeff Smith <whydoubt@gmail.com>
Reviewed-by: John Keeping <john@keeping.me.uk>
diff --git a/ui-blame.c b/ui-blame.c
index d4a4534..62647a8 100644
--- a/ui-blame.c
+++ b/ui-blame.c
@@ -51,7 +51,7 @@
 
 	char *detail = emit_suspect_detail(suspect);
 
-	html("<tr><td class='sha1 lines'>");
+	html("<tr><td class='sha1 hashes'>");
 	cgit_commit_link(find_unique_abbrev(oid->hash, DEFAULT_ABBREV), detail,
 			 NULL, ctx.qry.head, oid_to_hex(oid), suspect->path);
 	html("</td>\n");