build: add cargo doc task to include private items; fix that build

.vscode/tasks.json

@@ -13,6 +13,19 @@
 				"isDefault": false
 			},
 			"label": "rust: cargo doc"
+		},
+		{
+			"type": "cargo",
+			"command": "doc",
+			"args": ["--no-deps", "--locked", "--document-private-items"],
+			"problemMatcher": [
+				"$rustc"
+			],
+			"group": {
+				"kind": "build",
+				"isDefault": false
+			},
+			"label": "rust: cargo doc --document-private-items"
 		}
 	]
 }

src/client/job.rs

@@ -70,7 +70,7 @@ impl CopyJobSpec {
         }
     }
 
-    /// The [user@]hostname portion of whichever of the arguments contained a hostname.
+    /// The `[user@]hostname` portion of whichever of the arguments contained a hostname.
     fn remote_user_host(&self) -> &str {
         self.source
             .host

src/client/options.rs

@@ -101,8 +101,8 @@ impl Parameters {
     /// A best-effort attempt to extract a single remote host string from the parameters.
     ///
     /// # Output
-    /// If neither source nor dest are present, Ok("")
-    /// If at most one of source and dest contains a remote host, Ok(<host>)
+    /// If neither source nor dest are present, `Ok("")`
+    /// If at most one of source and dest contains a remote host, `Ok(<host>)`
     ///
     /// # Errors
     /// If both source and dest contain a remote host, Err("Only one remote file argument is supported")