Further edits to help messages (#6913)

crates/nu-command/src/strings/char_.rs

@@ -184,8 +184,8 @@ impl Command for Char {
                 result: Some(Value::test_string("\n")),
             },
             Example {
-                description: "Output prompt character, newline and a hamburger character",
-                example: r#"echo [(char prompt) (char newline) (char hamburger)] | str join"#,
+                description: "Output prompt character, newline and a hamburger menu character",
+                example: r#"(char prompt) + (char newline) + (char hamburger)"#,
                 result: Some(Value::test_string("\u{25b6}\n\u{2261}")),
             },
             Example {

crates/nu-command/src/strings/encode_decode/encode.rs

@@ -41,7 +41,7 @@ documentation link at https://docs.rs/encoding_rs/0.8.28/encoding_rs/#statics"#
     fn examples(&self) -> Vec<Example> {
         vec![Example {
             description: "Encode an UTF-8 string into Shift-JIS",
-            example: r#"echo "負けると知って戦うのが、遥かに美しいのだ" | encode shift-jis"#,
+            example: r#""負けると知って戦うのが、遥かに美しいのだ" | encode shift-jis"#,
             result: Some(Value::Binary {
                 val: vec![
                     0x95, 0x89, 0x82, 0xaf, 0x82, 0xe9, 0x82, 0xc6, 0x92, 0x6d, 0x82, 0xc1, 0x82,

crates/nu-command/src/strings/str_/collect.rs

@@ -21,7 +21,7 @@ impl Command for StrCollect {
                 SyntaxShape::String,
                 "optional separator to use when creating string",
             )
-            .category(Category::Strings)
+            .category(Category::Deprecated)
     }
 
     fn usage(&self) -> &str {