10 files changed, 44 insertions, 43 deletions

diff --git a/crates/assists/src/assist_config.rs b/crates/assists/src/assist_config.rs
index 786224cfa..c458d9054 100644
--- a/crates/assists/src/assist_config.rs
+++ b/crates/assists/src/assist_config.rs
@@ -5,7 +5,7 @@
 //! assists if we are allowed to.
 
 use hir::PrefixKind;
-use ide_db::helpers::insert_use::MergeBehaviour;
+use ide_db::helpers::insert_use::MergeBehavior;
 
 use crate::AssistKind;
 
@@ -39,12 +39,12 @@ impl Default for AssistConfig {
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct InsertUseConfig {
-    pub merge: Option<MergeBehaviour>,
+    pub merge: Option<MergeBehavior>,
     pub prefix_kind: PrefixKind,
 }
 
 impl Default for InsertUseConfig {
     fn default() -> Self {
-        InsertUseConfig { merge: Some(MergeBehaviour::Full), prefix_kind: PrefixKind::Plain }
+        InsertUseConfig { merge: Some(MergeBehavior::Full), prefix_kind: PrefixKind::Plain }
     }
 }
diff --git a/crates/assists/src/handlers/merge_imports.rs b/crates/assists/src/handlers/merge_imports.rs
index b7e853994..2f0dc7831 100644
--- a/crates/assists/src/handlers/merge_imports.rs
+++ b/crates/assists/src/handlers/merge_imports.rs
@@ -1,4 +1,4 @@
-use ide_db::helpers::insert_use::{try_merge_imports, try_merge_trees, MergeBehaviour};
+use ide_db::helpers::insert_use::{try_merge_imports, try_merge_trees, MergeBehavior};
 use syntax::{
     algo::{neighbor, SyntaxRewriter},
     ast, AstNode,
@@ -30,7 +30,7 @@ pub(crate) fn merge_imports(acc: &mut Assists, ctx: &AssistContext) -> Option<()
     if let Some(use_item) = tree.syntax().parent().and_then(ast::Use::cast) {
         let (merged, to_delete) =
             next_prev().filter_map(|dir| neighbor(&use_item, dir)).find_map(|use_item2| {
-                try_merge_imports(&use_item, &use_item2, MergeBehaviour::Full).zip(Some(use_item2))
+                try_merge_imports(&use_item, &use_item2, MergeBehavior::Full).zip(Some(use_item2))
             })?;
 
         rewriter.replace_ast(&use_item, &merged);
@@ -42,7 +42,7 @@ pub(crate) fn merge_imports(acc: &mut Assists, ctx: &AssistContext) -> Option<()
     } else {
         let (merged, to_delete) =
             next_prev().filter_map(|dir| neighbor(&tree, dir)).find_map(|use_tree| {
-                try_merge_trees(&tree, &use_tree, MergeBehaviour::Full).zip(Some(use_tree))
+                try_merge_trees(&tree, &use_tree, MergeBehavior::Full).zip(Some(use_tree))
             })?;
 
         rewriter.replace_ast(&tree, &merged);
diff --git a/crates/completion/src/completions/unqualified_path.rs b/crates/completion/src/completions/unqualified_path.rs
index 4e4e2b36f..3372fb1a2 100644
--- a/crates/completion/src/completions/unqualified_path.rs
+++ b/crates/completion/src/completions/unqualified_path.rs
@@ -45,7 +45,7 @@ pub(crate) fn complete_unqualified_path(acc: &mut Completions, ctx: &CompletionC
     });
 
     if ctx.config.enable_autoimport_completions && ctx.config.resolve_additional_edits_lazily() {
-        fuzzy_completion(acc, ctx).unwrap_or_default()
+        fuzzy_completion(acc, ctx);
     }
 }
 
@@ -100,10 +100,10 @@ fn complete_enum_variants(acc: &mut Completions, ctx: &CompletionContext, ty: &T
 // To avoid an excessive amount of the results returned, completion input is checked for inclusion in the identifiers only
 // (i.e. in `HashMap` in the `std::collections::HashMap` path), also not in the module indentifiers.
 //
-// .Merge Behaviour
+// .Merge Behavior
 //
-// It is possible to configure how use-trees are merged with the `importMergeBehaviour` setting.
-// Mimics the corresponding behaviour of the `Auto Import` feature.
+// It is possible to configure how use-trees are merged with the `importMergeBehavior` setting.
+// Mimics the corresponding behavior of the `Auto Import` feature.
 //
 // .LSP and performance implications
 //
@@ -150,7 +150,7 @@ fn fuzzy_completion(acc: &mut Completions, ctx: &CompletionContext) -> Option<()
             ImportEdit {
                 import_path: import_path.clone(),
                 import_scope: import_scope.clone(),
-                merge_behaviour: ctx.config.merge,
+                merge_behavior: ctx.config.merge,
             },
             &definition,
         )
diff --git a/crates/completion/src/config.rs b/crates/completion/src/config.rs
index 5175b9d69..30577dc11 100644
--- a/crates/completion/src/config.rs
+++ b/crates/completion/src/config.rs
@@ -4,7 +4,7 @@
 //! module, and we use to statically check that we only produce snippet
 //! completions if we are allowed to.
 
-use ide_db::helpers::insert_use::MergeBehaviour;
+use ide_db::helpers::insert_use::MergeBehavior;
 use rustc_hash::FxHashSet;
 
 #[derive(Clone, Debug, PartialEq, Eq)]
@@ -14,7 +14,7 @@ pub struct CompletionConfig {
     pub add_call_parenthesis: bool,
     pub add_call_argument_snippets: bool,
     pub snippet_cap: Option<SnippetCap>,
-    pub merge: Option<MergeBehaviour>,
+    pub merge: Option<MergeBehavior>,
     /// A set of capabilities, enabled on the client and supported on the server.
     pub active_resolve_capabilities: FxHashSet<CompletionResolveCapability>,
 }
@@ -56,7 +56,7 @@ impl Default for CompletionConfig {
             add_call_parenthesis: true,
             add_call_argument_snippets: true,
             snippet_cap: Some(SnippetCap { _private: () }),
-            merge: Some(MergeBehaviour::Full),
+            merge: Some(MergeBehavior::Full),
             active_resolve_capabilities: FxHashSet::default(),
         }
     }
diff --git a/crates/completion/src/item.rs b/crates/completion/src/item.rs
index bd94402d7..83166df4e 100644
--- a/crates/completion/src/item.rs
+++ b/crates/completion/src/item.rs
@@ -4,7 +4,7 @@ use std::fmt;
 
 use hir::{Documentation, ModPath, Mutability};
 use ide_db::helpers::{
-    insert_use::{self, ImportScope, MergeBehaviour},
+    insert_use::{self, ImportScope, MergeBehavior},
     mod_path_to_ast,
 };
 use syntax::{algo, TextRange};
@@ -271,7 +271,7 @@ impl CompletionItem {
 pub struct ImportEdit {
     pub import_path: ModPath,
     pub import_scope: ImportScope,
-    pub merge_behaviour: Option<MergeBehaviour>,
+    pub merge_behavior: Option<MergeBehavior>,
 }
 
 impl ImportEdit {
@@ -283,7 +283,7 @@ impl ImportEdit {
         let rewriter = insert_use::insert_use(
             &self.import_scope,
             mod_path_to_ast(&self.import_path),
-            self.merge_behaviour,
+            self.merge_behavior,
         );
         let old_ast = rewriter.rewrite_root()?;
         let mut import_insert = TextEdit::builder();
diff --git a/crates/completion/src/lib.rs b/crates/completion/src/lib.rs
index f60f87243..6a4b3c167 100644
--- a/crates/completion/src/lib.rs
+++ b/crates/completion/src/lib.rs
@@ -153,7 +153,7 @@ pub fn resolve_completion_edits(
         })
         .find(|mod_path| mod_path.to_string() == full_import_path)?;
 
-    ImportEdit { import_path, import_scope, merge_behaviour: config.merge }
+    ImportEdit { import_path, import_scope, merge_behavior: config.merge }
         .to_text_edit()
         .map(|edit| vec![edit])
 }
diff --git a/crates/ide_db/src/helpers/insert_use.rs b/crates/ide_db/src/helpers/insert_use.rs
index 040843990..9be36d59b 100644
--- a/crates/ide_db/src/helpers/insert_use.rs
+++ b/crates/ide_db/src/helpers/insert_use.rs
@@ -93,7 +93,7 @@ fn is_inner_comment(token: SyntaxToken) -> bool {
 pub fn insert_use<'a>(
     scope: &ImportScope,
     path: ast::Path,
-    merge: Option<MergeBehaviour>,
+    merge: Option<MergeBehavior>,
 ) -> SyntaxRewriter<'a> {
     let _p = profile::span("insert_use");
     let mut rewriter = SyntaxRewriter::default();
@@ -183,7 +183,7 @@ fn eq_visibility(vis0: Option<ast::Visibility>, vis1: Option<ast::Visibility>) -
 pub fn try_merge_imports(
     lhs: &ast::Use,
     rhs: &ast::Use,
-    merge_behaviour: MergeBehaviour,
+    merge_behavior: MergeBehavior,
 ) -> Option<ast::Use> {
     // don't merge imports with different visibilities
     if !eq_visibility(lhs.visibility(), rhs.visibility()) {
@@ -191,14 +191,14 @@ pub fn try_merge_imports(
     }
     let lhs_tree = lhs.use_tree()?;
     let rhs_tree = rhs.use_tree()?;
-    let merged = try_merge_trees(&lhs_tree, &rhs_tree, merge_behaviour)?;
+    let merged = try_merge_trees(&lhs_tree, &rhs_tree, merge_behavior)?;
     Some(lhs.with_use_tree(merged))
 }
 
 pub fn try_merge_trees(
     lhs: &ast::UseTree,
     rhs: &ast::UseTree,
-    merge: MergeBehaviour,
+    merge: MergeBehavior,
 ) -> Option<ast::UseTree> {
     let lhs_path = lhs.path()?;
     let rhs_path = rhs.path()?;
@@ -220,7 +220,7 @@ pub fn try_merge_trees(
 fn recursive_merge(
     lhs: &ast::UseTree,
     rhs: &ast::UseTree,
-    merge: MergeBehaviour,
+    merge: MergeBehavior,
 ) -> Option<ast::UseTree> {
     let mut use_trees = lhs
         .use_tree_list()
@@ -301,7 +301,7 @@ fn recursive_merge(
                 }
             }
             Err(_)
-                if merge == MergeBehaviour::Last
+                if merge == MergeBehavior::Last
                     && use_trees.len() > 0
                     && rhs_t.use_tree_list().is_some() =>
             {
@@ -438,20 +438,20 @@ fn path_segment_cmp(a: &ast::PathSegment, b: &ast::PathSegment) -> Ordering {
 
 /// What type of merges are allowed.
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
-pub enum MergeBehaviour {
+pub enum MergeBehavior {
     /// Merge everything together creating deeply nested imports.
     Full,
     /// Only merge the last import level, doesn't allow import nesting.
     Last,
 }
 
-impl MergeBehaviour {
+impl MergeBehavior {
     #[inline]
     fn is_tree_allowed(&self, tree: &ast::UseTree) -> bool {
         match self {
-            MergeBehaviour::Full => true,
+            MergeBehavior::Full => true,
             // only simple single segment paths are allowed
-            MergeBehaviour::Last => {
+            MergeBehavior::Last => {
                 tree.use_tree_list().is_none() && tree.path().map(path_len) <= Some(1)
             }
         }
diff --git a/crates/ide_db/src/helpers/insert_use/tests.rs b/crates/ide_db/src/helpers/insert_use/tests.rs
index 86bfa5b41..9e194354e 100644
--- a/crates/ide_db/src/helpers/insert_use/tests.rs
+++ b/crates/ide_db/src/helpers/insert_use/tests.rs
@@ -533,7 +533,7 @@ fn merge_last_fail() {
     check_merge_only_fail(
         r"use foo::bar::{baz::{Qux, Fez}};",
         r"use foo::bar::{baaz::{Quux, Feez}};",
-        MergeBehaviour::Last,
+        MergeBehavior::Last,
     );
 }
 
@@ -542,7 +542,7 @@ fn merge_last_fail1() {
     check_merge_only_fail(
         r"use foo::bar::{baz::{Qux, Fez}};",
         r"use foo::bar::baaz::{Quux, Feez};",
-        MergeBehaviour::Last,
+        MergeBehavior::Last,
     );
 }
 
@@ -551,7 +551,7 @@ fn merge_last_fail2() {
     check_merge_only_fail(
         r"use foo::bar::baz::{Qux, Fez};",
         r"use foo::bar::{baaz::{Quux, Feez}};",
-        MergeBehaviour::Last,
+        MergeBehavior::Last,
     );
 }
 
@@ -560,7 +560,7 @@ fn merge_last_fail3() {
     check_merge_only_fail(
         r"use foo::bar::baz::{Qux, Fez};",
         r"use foo::bar::baaz::{Quux, Feez};",
-        MergeBehaviour::Last,
+        MergeBehavior::Last,
     );
 }
 
@@ -568,7 +568,7 @@ fn check(
     path: &str,
     ra_fixture_before: &str,
     ra_fixture_after: &str,
-    mb: Option<MergeBehaviour>,
+    mb: Option<MergeBehavior>,
     module: bool,
 ) {
     let mut syntax = ast::SourceFile::parse(ra_fixture_before).tree().syntax().clone();
@@ -589,18 +589,18 @@ fn check(
 }
 
 fn check_full(path: &str, ra_fixture_before: &str, ra_fixture_after: &str) {
-    check(path, ra_fixture_before, ra_fixture_after, Some(MergeBehaviour::Full), false)
+    check(path, ra_fixture_before, ra_fixture_after, Some(MergeBehavior::Full), false)
 }
 
 fn check_last(path: &str, ra_fixture_before: &str, ra_fixture_after: &str) {
-    check(path, ra_fixture_before, ra_fixture_after, Some(MergeBehaviour::Last), false)
+    check(path, ra_fixture_before, ra_fixture_after, Some(MergeBehavior::Last), false)
 }
 
 fn check_none(path: &str, ra_fixture_before: &str, ra_fixture_after: &str) {
     check(path, ra_fixture_before, ra_fixture_after, None, false)
 }
 
-fn check_merge_only_fail(ra_fixture0: &str, ra_fixture1: &str, mb: MergeBehaviour) {
+fn check_merge_only_fail(ra_fixture0: &str, ra_fixture1: &str, mb: MergeBehavior) {
     let use0 = ast::SourceFile::parse(ra_fixture0)
         .tree()
         .syntax()
diff --git a/crates/rust-analyzer/src/config.rs b/crates/rust-analyzer/src/config.rs
index 8d37638f4..1f4b5c24c 100644
--- a/crates/rust-analyzer/src/config.rs
+++ b/crates/rust-analyzer/src/config.rs
@@ -12,7 +12,7 @@ use std::{convert::TryFrom, ffi::OsString, path::PathBuf};
 use flycheck::FlycheckConfig;
 use hir::PrefixKind;
 use ide::{AssistConfig, CompletionConfig, DiagnosticsConfig, HoverConfig, InlayHintsConfig};
-use ide_db::helpers::insert_use::MergeBehaviour;
+use ide_db::helpers::insert_use::MergeBehavior;
 use itertools::Itertools;
 use lsp_types::{ClientCapabilities, MarkupKind};
 use project_model::{CargoConfig, ProjectJson, ProjectJsonData, ProjectManifest};
@@ -25,7 +25,7 @@ use crate::{caps::enabled_completions_resolve_capabilities, diagnostics::Diagnos
 config_data! {
     struct ConfigData {
         /// The strategy to use when inserting new imports or merging imports.
-        assist_importMergeBehaviour: MergeBehaviourDef = "\"full\"",
+        assist_importMergeBehaviour: MergeBehaviorDef = "\"full\"",
         /// The path structure for newly inserted paths to use.
         assist_importPrefix: ImportPrefixDef           = "\"plain\"",
 
@@ -447,9 +447,9 @@ impl Config {
         };
 
         self.assist.insert_use.merge = match data.assist_importMergeBehaviour {
-            MergeBehaviourDef::None => None,
-            MergeBehaviourDef::Full => Some(MergeBehaviour::Full),
-            MergeBehaviourDef::Last => Some(MergeBehaviour::Last),
+            MergeBehaviorDef::None => None,
+            MergeBehaviorDef::Full => Some(MergeBehavior::Full),
+            MergeBehaviorDef::Last => Some(MergeBehavior::Last),
         };
         self.assist.insert_use.prefix_kind = match data.assist_importPrefix {
             ImportPrefixDef::Plain => PrefixKind::Plain,
@@ -606,7 +606,7 @@ enum ManifestOrProjectJson {
 
 #[derive(Deserialize)]
 #[serde(rename_all = "snake_case")]
-enum MergeBehaviourDef {
+enum MergeBehaviorDef {
     None,
     Full,
     Last,
@@ -740,7 +740,7 @@ fn field_props(field: &str, ty: &str, doc: &[&str], default: &str) -> serde_json
             "type": ["null", "array"],
             "items": { "type": "string" },
         },
-        "MergeBehaviourDef" => set! {
+        "MergeBehaviorDef" => set! {
             "type": "string",
             "enum": ["none", "full", "last"],
             "enumDescriptions": [
diff --git a/docs/dev/style.md b/docs/dev/style.md
index 1a952197f..c8d943142 100644
--- a/docs/dev/style.md
+++ b/docs/dev/style.md
@@ -514,6 +514,7 @@ impl Parent {
 Use boring and long names for local variables ([yay code completion](https://github.com/rust-analyzer/rust-analyzer/pull/4162#discussion_r417130973)).
 The default name is a lowercased name of the type: `global_state: GlobalState`.
 Avoid ad-hoc acronyms and contractions, but use the ones that exist consistently (`db`, `ctx`, `acc`).
+Prefer American spelling (color, behavior).
 
 Default names: