Move arrows back to original position; add Base value to figure.

draft-ietf-quic-qpack.md

@@ -537,9 +537,9 @@ In a header block a relative index of "0" refers to the entry with absolute
 index equal to Base - 1.
 
 ~~~~~ drawing
-            Base
-             |
-             V
+               Base
+                |
+                V
     +-----+-----+-----+-----+-------+
     | n-1 | n-2 | n-3 | ... |   d   |  Absolute Index
     +-----+-----+  -  +-----+   -   +
@@ -548,6 +548,7 @@ index equal to Base - 1.
 
 n = count of entries inserted
 d = count of entries dropped
+In this example, Base = n - 2
 ~~~~~
 {: title="Example Dynamic Table Indexing - Relative Index in Header Block"}
 
@@ -563,9 +564,9 @@ and include references to entries added while processing this (or other) header
 blocks.
 
 ~~~~~ drawing
-            Base
-             |
-             V
+               Base
+                |
+                V
     +-----+-----+-----+-----+-----+
     | n-1 | n-2 | n-3 | ... |  d  |  Absolute Index
     +-----+-----+-----+-----+-----+
@@ -574,6 +575,7 @@ blocks.
 
 n = count of entries inserted
 d = count of entries dropped
+In this example, Base = n - 2
 ~~~~~
 {: title="Example Dynamic Table Indexing - Post-Base Index in Header Block"}