Merge pull request #265 from calvingiles/date_spine_docs

Clarify date_spine behaviour in docs.

Author: Claire Carroll

CHANGELOG.md

@@ -55,3 +55,4 @@ database adapters that use different prefixes ([#267](https://github.com/fishtow
 ## Quality of life
 * Improve release process, and fix tests ([#251](https://github.com/fishtown-analytics/dbt-utils/pull/251))
 * Make deprecation warnings more useful ([#258](https://github.com/fishtown-analytics/dbt-utils/pull/258) [@tayloramurphy](https://github.com/tayloramurphy))
+* Add more docs for `date_spine` ([#265](https://github.com/fishtown-analytics/dbt-utils/pull/265) [@calvingiles](https://github.com/calvingiles))

README.md

@@ -95,7 +95,7 @@ Usage:
 ---
 ### Date/Time
 #### date_spine ([source](macros/datetime/date_spine.sql))
-This macro returns the sql required to build a date spine.
+This macro returns the sql required to build a date spine. The spine will include the `start_date` (if it is aligned to the `datepart`), but it will not include the `end_date`. 
 
 Usage:
 ```