Use variable names directly in the format strings (#7906)

# Description

Lint: `clippy::uninlined_format_args`

More readable in most situations.
(May be slightly confusing for modifier format strings
https://doc.rust-lang.org/std/fmt/index.html#formatting-parameters)

Alternative to #7865

# User-Facing Changes

None intended

# Tests + Formatting

(Ran `cargo +stable clippy --fix --workspace -- -A clippy::all -D
clippy::uninlined_format_args` to achieve this. Depends on Rust `1.67`)

crates/nu-command/src/platform/ansi/ansi_.rs

@@ -682,13 +682,13 @@ Format: #
         }
 
         let output = if escape && param_is_valid_string {
-            format!("\x1b[{}", code_string)
+            format!("\x1b[{code_string}")
         } else if osc && param_is_valid_string {
             // Operating system command aka osc  ESC ] <- note the right brace, not left brace for osc
             // OCS's need to end with either:
             // bel '\x07' char
             // string terminator aka st '\\' char
-            format!("\x1b]{}", code_string)
+            format!("\x1b]{code_string}")
         } else if param_is_valid_string {
             // parse hex colors like #00FF00
             if code_string.starts_with('#') {
@@ -700,7 +700,7 @@ Format: #
                     Err(err) => {
                         return Err(ShellError::GenericError(
                             "error parsing hex color".to_string(),
-                            format!("{}", err),
+                            format!("{err}"),
                             Some(code.span()?),
                             None,
                             Vec::new(),
@@ -738,7 +738,7 @@ Format: #
                     "attr" => nu_style.attr = Some(v.as_string()?),
                     _ => {
                         return Err(ShellError::IncompatibleParametersSingle(
-                            format!("problem with key: {}", k),
+                            format!("problem with key: {k}"),
                             code.expect_span(),
                         ))
                     }

crates/nu-command/src/platform/ansi/link.rs

@@ -146,7 +146,7 @@ fn process_value(value: &Value, text: &Option<String>, command_span: &Span) -> V
 }
 
 fn add_osc_link(text: &str, link: &str) -> String {
-    format!("\u{1b}]8;;{}\u{1b}\\{}\u{1b}]8;;\u{1b}\\", link, text)
+    format!("\u{1b}]8;;{link}\u{1b}\\{text}\u{1b}]8;;\u{1b}\\")
 }
 
 #[cfg(test)]