Add --no-newline option to nu (#12410)

# Description
I have `nu` set as my shell in my editor, which allows me to easily pipe
selections of text to things like `str pascal-case` or even more complex
string operation pipelines, which I find super handy. However, the only
annoying thing is that I pretty much always have to add `| print -n` at
the end, because `nu` adds a newline when it prints the resulting value.

This adds a `--no-newline` option to stop that from happening, and then
you don't need to pipe to `print -n` anymore, you can just have your
shell command for your editor contain that flag.

# User-Facing Changes
- Add `--no-newline` command line option

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

src/command.rs

@@ -97,6 +97,7 @@ pub(crate) fn parse_commandline_args(
             let execute = call.get_flag_expr("execute");
             let table_mode: Option<Value> =
                 call.get_flag(engine_state, &mut stack, "table-mode")?;
+            let no_newline = call.get_named_arg("no-newline");
 
             // ide flags
             let lsp = call.has_flag(engine_state, &mut stack, "lsp")?;
@@ -190,6 +191,7 @@ pub(crate) fn parse_commandline_args(
                 ide_check,
                 ide_ast,
                 table_mode,
+                no_newline,
             });
         }
     }
@@ -224,6 +226,7 @@ pub(crate) struct NushellCliArgs {
     pub(crate) log_target: Option<Spanned<String>>,
     pub(crate) execute: Option<Spanned<String>>,
     pub(crate) table_mode: Option<Value>,
+    pub(crate) no_newline: Option<Spanned<String>>,
     pub(crate) include_path: Option<Spanned<String>>,
     pub(crate) lsp: bool,
     pub(crate) ide_goto_def: Option<Value>,
@@ -270,6 +273,7 @@ impl Command for Nu {
                 "the table mode to use. rounded is default.",
                 Some('m'),
             )
+            .switch("no-newline", "print the result for --commands(-c) without a newline", None)
             .switch(
                 "no-config-file",
                 "start with no config file and no env file",

src/run.rs

@@ -118,6 +118,7 @@ pub(crate) fn run_commands(
         &mut stack,
         input,
         parsed_nu_cli_args.table_mode,
+        parsed_nu_cli_args.no_newline.is_some(),
     );
     perf(
         "evaluate_commands",