change underscore to hyphen

Author: asonnenschein

docs/cli/cli-subscriptions.md

@@ -128,7 +128,7 @@ planet subscriptions list
 ```
 
 outputs the JSON for your first 100 subscriptions. If you'd like more you can set the `--limit`
-parameter higher, or you can set it to 0 and there will be no limit.  By default the `list` command will request Subscriptions API with a page size of 500 subscriptions, and can be set lower or higher with the `--page_size` parameter.
+parameter higher, or you can set it to 0 and there will be no limit.  By default the `list` command will request Subscriptions API with a page size of 500 subscriptions, and can be set lower or higher with the `--page-size` parameter.
 
 You can get nicer formatting with `--pretty` or pipe it into `jq`, just like the other Planet
 CLI’s.

planet/cli/subscriptions.py

@@ -118,7 +118,7 @@ def subscriptions(ctx, base_url):
     documentation
     for examples.""")
 @limit
-@click.option('--page_size',
+@click.option('--page-size',
               type=click.INT,
               help='Number of subscriptions to return per page.')
 @click.pass_context