minor style nits

* simplification of some imports
* prefer `is_some_and` to `map_or` (`is_some_and` was not yet stable
  when the is_dir comment was written)
* be more specific in the description for 'ui.text.directory' theme key

book/src/themes.md

@@ -305,7 +305,7 @@ These scopes are used for theming the editor interface:
 | `ui.text.focus`                   | The currently selected line in the picker                                                      |
 | `ui.text.inactive`                | Same as `ui.text` but when the text is inactive (e.g. suggestions)                             |
 | `ui.text.info`                    | The key: command text in `ui.popup.info` boxes                                                 |
-| `ui.text.directory`               | Color of directories                                                                           |
+| `ui.text.directory`               | Directory names in prompt completion                                                           |
 | `ui.virtual.ruler`                | Ruler columns (see the [`editor.rulers` config][editor-section])                               |
 | `ui.virtual.whitespace`           | Visible whitespace characters                                                                  |
 | `ui.virtual.indent-guide`         | Vertical indent width guides                                                                   |

helix-term/src/ui/mod.rs

@@ -277,12 +277,12 @@ pub fn file_picker(root: PathBuf, config: &helix_view::editor::Config) -> FilePi
 }
 
 pub mod completers {
+    use super::Utf8PathBuf;
     use crate::ui::prompt::Completion;
-    use crate::ui::Utf8PathBuf;
     use helix_core::fuzzy::fuzzy_match;
     use helix_core::syntax::LanguageServerFeature;
     use helix_view::document::SCRATCH_BUFFER_NAME;
-    use helix_view::theme::{self};
+    use helix_view::theme;
     use helix_view::{editor::Config, Editor};
     use once_cell::sync::Lazy;
     use std::borrow::Cow;
@@ -495,7 +495,7 @@ pub mod completers {
                         return None;
                     }
 
-                    let is_dir = entry.file_type().map_or(false, |entry| entry.is_dir());
+                    let is_dir = entry.file_type().is_some_and(|entry| entry.is_dir());
 
                     let path = entry.path();
                     let mut path = if is_tilde {