Improve matches on command palette (#8515)

Release Notes:

- Fixed consecutive spaces in command palette influencing selection.
#8184

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https://github.com/zed-industries/zed/assets/25414681/a4682247-f52c-4ab9-a32a-51ab5cf3dbcc

crates/command_palette/src/command_palette.rs

@@ -37,6 +37,24 @@ pub struct CommandPalette {
     picker: View<Picker<CommandPaletteDelegate>>,
 }
 
+fn trim_consecutive_whitespaces(input: &str) -> String {
+    let mut result = String::with_capacity(input.len());
+    let mut last_char_was_whitespace = false;
+
+    for char in input.trim().chars() {
+        if char.is_whitespace() {
+            if !last_char_was_whitespace {
+                result.push(char);
+            }
+            last_char_was_whitespace = true;
+        } else {
+            result.push(char);
+            last_char_was_whitespace = false;
+        }
+    }
+    result
+}
+
 impl CommandPalette {
     fn register(workspace: &mut Workspace, _: &mut ViewContext<Workspace>) {
         workspace.register_action(|workspace, _: &Toggle, cx| {
@@ -247,7 +265,7 @@ impl PickerDelegate for CommandPaletteDelegate {
             let mut commands = self.all_commands.clone();
             let hit_counts = cx.global::<HitCounts>().clone();
             let executor = cx.background_executor().clone();
-            let query = query.clone();
+            let query = trim_consecutive_whitespaces(&query.as_str());
             async move {
                 commands.sort_by_key(|action| {
                     (
@@ -265,7 +283,6 @@ impl PickerDelegate for CommandPaletteDelegate {
                         char_bag: command.name.chars().collect(),
                     })
                     .collect::<Vec<_>>();
-
                 let matches = if query.is_empty() {
                     candidates
                         .into_iter()