manual: Fix typo in description of blob tables.

Blob indices start at one, so "positive" is correct.

diff --git a/web/manual.md b/web/manual.md
index b154b3919091ff6a897a45f0f333fba1be4875bc..15386134771c2921ecf840347e8179aecc374e1a 100644 (file)
--- a/web/manual.md
+++ b/web/manual.md
@@ -754,8 +754,8 @@ these commands.
 
 The image, lyrics, moods and playlists tables are all blob tables.
 Blob tables consist of three columns each: The identifier which is
-a positive non-negative number that is auto-incremented, the name
-(an arbitrary string) and the content (the blob).
+a positive number that is auto-incremented, the name (an arbitrary
+string) and the content (the blob).
 
 All blob tables support the same set of actions: cat, ls, mv, rm
 and add. Of course, _add_ is used for adding new blobs to the table