Merge branch 'ds/commit-graph'

Docfix.

* ds/commit-graph:
  commit-graph: fix documentation inconsistencies

diff --cc Documentation/technical/commit-graph-format.txt
index 2c965d594fed46a84d541e4159046ee9d629a076,91c2fbd86a3b2d66e76fcf3312d735db0fb1dc84..cc0474ba3ee4b04153752340328233437d5c7b05
--- 1/Documentation/technical/commit-graph-format.txt
--- 2/Documentation/technical/commit-graph-format.txt
+++ b/Documentation/technical/commit-graph-format.txt
@@@ -18,9 -18,9 +18,9 @@@ metadata, including
    the graph file.
  
  These positional references are stored as unsigned 32-bit integers
- corresponding to the array position within the list of commit OIDs. We
- use the most-significant bit for special purposes, so we can store at most
- (1 << 31) - 1 (around 2 billion) commits.
 -corresponding to the array position withing the list of commit OIDs. Due
++corresponding to the array position within the list of commit OIDs. Due
+ to some special constants we use to track parents, we can store at most
+ (1 << 30) + (1 << 29) + (1 << 28) - 1 (around 1.8 billion) commits.
  
  == Commit graph files have the following format: