MINOR: Fix typo in PageIndex.md (#212)
diff --git a/PageIndex.md b/PageIndex.md
index 96f7a47..f4a8f64 100644
--- a/PageIndex.md
+++ b/PageIndex.md
@@ -34,17 +34,17 @@
## Goals
1. Make both range scans and point lookups I/O efficient by allowing direct
access to pages based on their min and max values. In particular:
-2. A single-row lookup in a row group based on the sort column of that row group
+ * A single-row lookup in a row group based on the sort column of that row group
will only read one data page per the retrieved column.
* Range scans on the sort column will only need to read the exact data
pages that contain relevant data.
* Make other selective scans I/O efficient: if we have a very selective
predicate on a non-sorting column, for the other retrieved columns we
should only need to access data pages that contain matching rows.
-3. No additional decoding effort for scans without selective predicates, e.g.,
+2. No additional decoding effort for scans without selective predicates, e.g.,
full-row group scans. If a reader determines that it does not need to read
the index data, it does not incur any overhead.
-4. Index pages for sorted columns use minimal storage by storing only the
+3. Index pages for sorted columns use minimal storage by storing only the
boundary elements between pages.
## Non-Goals
