Use line-length setting for isort (#8235)

crates/ruff_workspace/src/configuration.rs

@@ -228,6 +228,7 @@ impl Configuration {
                     .unwrap_or_else(|| DUMMY_VARIABLE_RGX.clone()),
                 external: lint.external.unwrap_or_default(),
                 ignore_init_module_imports: lint.ignore_init_module_imports.unwrap_or_default(),
+                line_length,
                 tab_size: self.indent_width.unwrap_or_default(),
                 namespace_packages: self.namespace_packages.unwrap_or_default(),
                 per_file_ignores: resolve_per_file_ignores(

crates/ruff_workspace/src/options.rs

@@ -352,7 +352,7 @@ pub struct Options {
 
     // Global Formatting options
     /// The line length to use when enforcing long-lines violations (like `E501`)
-    /// and at which the formatter prefers to wrap lines.
+    /// and at which `isort` and the formatter prefers to wrap lines.
     ///
     /// The length is determined by the number of characters per line, except for lines containing East Asian characters or emojis.
     /// For these lines, the [unicode width](https://unicode.org/reports/tr11/) of each character is added up to determine the length.