It-expansion fixes (#1757)

* It-expansion fixes

* fix clippy

crates/nu-cli/src/commands/classified/expr.rs

@@ -3,6 +3,7 @@ use crate::prelude::*;
 
 use log::{log_enabled, trace};
 
+use futures::stream::once;
 use nu_errors::ShellError;
 use nu_protocol::hir::SpannedExpression;
 use nu_protocol::Scope;
@@ -10,7 +11,7 @@ use nu_protocol::Scope;
 pub(crate) fn run_expression_block(
     expr: SpannedExpression,
     context: &mut Context,
-    input: InputStream,
+    _input: InputStream,
     scope: &Scope,
 ) -> Result<InputStream, ShellError> {
     if log_enabled!(log::Level::Trace) {
@@ -20,10 +21,7 @@ pub(crate) fn run_expression_block(
 
     let scope = scope.clone();
     let registry = context.registry().clone();
-    let stream = input.map(move |row| {
-        let scope = scope.clone().set_it(row);
-        evaluate_baseline_expr(&expr, &registry, &scope)
-    });
+    let output = evaluate_baseline_expr(&expr, &registry, &scope)?;
 
-    Ok(stream.to_input_stream())
+    Ok(once(async { Ok(output) }).to_input_stream())
 }

crates/nu-cli/src/commands/date.rs

@@ -33,6 +33,19 @@ impl WholeStreamCommand for Date {
     ) -> Result<OutputStream, ShellError> {
         date(args, registry)
     }
+
+    fn examples(&self) -> &[Example] {
+        &[
+            Example {
+                description: "Get the current local time and date",
+                example: "date",
+            },
+            Example {
+                description: "Get the current UTC time and date",
+                example: "date --utc",
+            },
+        ]
+    }
 }
 
 pub fn date_to_value<T: TimeZone>(dt: DateTime<T>, tag: Tag) -> Value