distance-oracle: fix docs and cli help

distance-oracle/src/main.rs

@@ -20,8 +20,10 @@ use clap::Parser;
 struct Cli {
     #[clap(short = 'd', long, default_value = "/tmp/duniter/chains/gdev/distance")]
     evaluation_result_dir: String,
+    /// Number of seconds between two evaluations (oneshot if absent)
     #[clap(short = 'i', long, default_value = "None")]
     interval: Option<u64>,
+    /// Node used for fetching state
     #[clap(short = 'u', long, default_value = "ws://127.0.0.1:9944")]
     rpc_url: String,
     /// Log level (off, error, warn, info, debug, trace)

docs/user/distance.md

@@ -8,7 +8,7 @@ Distance evaluation is operated on a voluntary basis by individual smiths. Since
 
 Any smith member authoring blocks can run a distance evaluation oracle. It is better to have a machine more powerful than the reference machine.
 
-Create a service from this commandline, run by the same user as Duniter, on the same system:
+Create a service from this command line, run by the same user as Duniter, on the same system:
 
     /absolute/path/to/duniter distance-oracle --interval <duration>
 

node/src/cli.rs

@@ -137,7 +137,7 @@ pub struct DistanceOracle {
     /// Number of seconds between two evaluations (oneshot if absent)
     #[clap(short = 'i', long)]
     pub interval: Option<u64>,
-    /// Local forging node
+    /// Node used for fetching state
     #[clap(short = 'u', long, default_value = "ws://127.0.0.1:9944")]
     pub rpc_url: String,
 }