Docs: Add "repository" case, and "open source" to style guide

closes #19404
closes #19281

contribute/documentation.md

@@ -35,8 +35,8 @@ For each section, a `_index.md` file is used to provide an overview of the topic
 
 
 ### Style guide
 ### Style guide
 
 
-The [codespell](https://github.com/codespell-project/codespell) tool is run for every change to catch common misspellings.
+A [style guide](https://github.com/grafana/grafana/blob/master/style_guides/documentation-style-guide.md), which applies to all documentation created by the Grafana project, is located in the [Grafana GitHub repository](https://github.com/grafana/grafana).
+
+### Spelling
 
 
-- "Open source" should be hyphenated when used as an adjective, e.g. _open-source software_. The open form should be preferred when used as a noun, e.g. _Grafana is open source_.
-- Use "data source" instead of "datasource" unless used as an identifier, in code or as part of URLs.
-- Acronyms should be uppercased, e.g. URL, DNS, or TCP/IP.
+The [codespell](https://github.com/codespell-project/codespell) tool is run for every change to catch common misspellings.

contribute/style-guides/documentation-style-guide.md

@@ -73,10 +73,6 @@ When possible, use the exact title of the page or section you are linking to as
 
 
 Grafana products has some words, abbreviations, and slang particular to this discourse community.
 Grafana products has some words, abbreviations, and slang particular to this discourse community.
 
 
-#### data source
-
-Two words, not one
-
-**Exceptions:**
-* "datasource" used as an identifier
-* "datasource" in a URL
+* "Open source" should be hyphenated when used as an adjective, e.g. *open-source software*. The open form should be preferred when used as a noun, e.g. *Grafana is open source*.
+* Use "data source" instead of "datasource" unless used as an identifier, in code, or as part of a URL.
+* Spell out "repository" and avoid the shorter "repo."