JAL-4090 update docs for changed gradle -P options for testng

diff --git a/doc/building.md b/doc/building.md
index b02fd89..aee827d 100644 (file)
--- a/doc/building.md
+++ b/doc/building.md
@@ -336,7 +336,7 @@ the `tests/` folder.  A summary of results should appear in your console.
 You can run different defined groups of tests with
 
 ```bash
-gradle test -PtestngGroups=Network
+gradle test -Ptestng_groups=Network
 ```
 
 Available groups include Functional (default), Network, External. 
@@ -348,7 +348,7 @@ Some of Jalview's Functional tests don't pass reliably in all environments. We t
 To exclude one or more groups of tests, add them as a comma separated list in testngExcludedGroups.
 
 ```bash
-gradle test -PtestngExcludedGroups=Not-bamboo
+gradle test -Ptestng_excluded_groups=Not-bamboo
 ```
 #### Viewing stdout and stderr for tests