Fix, clarify, add example to raw command help

synadm/cli/raw.py

@@ -31,8 +31,11 @@ def raw_request_cmd(helper, endpoint, method, data, data_file):
     """ Issue a custom request to the Synapse Admin API.
 
     The endpoint argument is the part of the URL _after_ the configured base
-    URL and Matrix path (see `synadm config`). A simple get request would e.g
-    look like this: `synadm matrix raw client/versions`
+    "Synapse base URL" and "Synapse Admin API path" (see `synadm config`).
+    A get request to the "Query User Account API" would look like this:
+    `synadm raw v2/users/%40testuser%3Aexample.org`. URL encoding must be
+    handled at this point. Consider enabling debug outputs via synadm's global
+    flag `-vv`
     """
     if data_file:
         data = data_file.read()