milenkovicm commented on code in PR #1850:
URL: 
https://github.com/apache/datafusion-ballista/pull/1850#discussion_r3393427048


##########
ballista-cli/src/tui/infrastructure/config.rs:
##########
@@ -81,10 +91,10 @@ impl Settings {
                         .format(FileFormat::Yaml)
                         .required(false),
                 )
-                // Add in settings from the environment (with a prefix of 
BALLISTA_)
-                // E.g. `BALLISTA_SCHEDULER_URL=http://localhost:50051 
ballista_cli`
+                // Add in settings from the environment (with a prefix of 
`BALLISTA`.)
+                // E.g. `BALLISTA__SCHEDULER__URL=http://localhost:50051 
ballista_cli`

Review Comment:
   Why double underscores ?



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