Tidy up `Cargo.toml` files.

- Add some missing `tidy-alphabetical-*` markers.
- Remove some unnecessary blank lines.

16 files changed, 44 insertions, 14 deletions

diff --git a/compiler/rustc_ast_ir/Cargo.toml b/compiler/rustc_ast_ir/Cargo.toml
index ee2ab62b725..1d21a07dc44 100644
--- a/compiler/rustc_ast_ir/Cargo.toml
+++ b/compiler/rustc_ast_ir/Cargo.toml
@@ -12,10 +12,12 @@ rustc_span = { path = "../rustc_span", optional = true }
 # tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 default = ["nightly"]
 nightly = [
-    "dep:rustc_serialize",
-    "dep:rustc_span",
     "dep:rustc_data_structures",
     "dep:rustc_macros",
+    "dep:rustc_serialize",
+    "dep:rustc_span",
 ]
+# tidy-alphabetical-end
diff --git a/compiler/rustc_codegen_llvm/Cargo.toml b/compiler/rustc_codegen_llvm/Cargo.toml
index 5ab22f8fc4d..adf9f709410 100644
--- a/compiler/rustc_codegen_llvm/Cargo.toml
+++ b/compiler/rustc_codegen_llvm/Cargo.toml
@@ -45,4 +45,7 @@ tracing = "0.1"
 # tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 check_only = ["rustc_llvm/check_only"]
+# tidy-alphabetical-end
+
diff --git a/compiler/rustc_driver_impl/Cargo.toml b/compiler/rustc_driver_impl/Cargo.toml
index 0d6b49607eb..ae1dbd2cf51 100644
--- a/compiler/rustc_driver_impl/Cargo.toml
+++ b/compiler/rustc_driver_impl/Cargo.toml
@@ -4,8 +4,8 @@ version = "0.0.0"
 edition = "2024"
 
 [dependencies]
-jiff = { version = "0.2.5", default-features = false, features = ["std"] }
 # tidy-alphabetical-start
+jiff = { version = "0.2.5", default-features = false, features = ["std"] }
 rustc_abi = { path = "../rustc_abi" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_ast_lowering = { path = "../rustc_ast_lowering" }
diff --git a/compiler/rustc_index/Cargo.toml b/compiler/rustc_index/Cargo.toml
index 3d83a3c98da..e46a1a7f760 100644
--- a/compiler/rustc_index/Cargo.toml
+++ b/compiler/rustc_index/Cargo.toml
@@ -15,8 +15,8 @@ smallvec = "1.8.1"
 # tidy-alphabetical-start
 default = ["nightly"]
 nightly = [
-    "dep:rustc_serialize",
     "dep:rustc_macros",
+    "dep:rustc_serialize",
     "rustc_index_macros/nightly",
 ]
 rustc_randomized_layouts = []
diff --git a/compiler/rustc_index_macros/Cargo.toml b/compiler/rustc_index_macros/Cargo.toml
index 891e7ded619..34f3109a526 100644
--- a/compiler/rustc_index_macros/Cargo.toml
+++ b/compiler/rustc_index_macros/Cargo.toml
@@ -7,9 +7,14 @@ edition = "2024"
 proc-macro = true
 
 [dependencies]
-syn = { version = "2.0.9", features = ["full", "extra-traits"] }
+# tidy-alphabetical-start
 proc-macro2 = "1"
 quote = "1"
+syn = { version = "2.0.9", features = ["full", "extra-traits"] }
+# tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 nightly = []
+# tidy-alphabetical-end
+
diff --git a/compiler/rustc_llvm/Cargo.toml b/compiler/rustc_llvm/Cargo.toml
index 85a2a9c09f0..cd352ce3d0f 100644
--- a/compiler/rustc_llvm/Cargo.toml
+++ b/compiler/rustc_llvm/Cargo.toml
@@ -16,5 +16,7 @@ cc = "=1.2.16"
 # tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 # Used by ./x.py check --compile-time-deps to skip building C++ code
 check_only = []
+# tidy-alphabetical-end
diff --git a/compiler/rustc_mir_build/Cargo.toml b/compiler/rustc_mir_build/Cargo.toml
index c4c2d8a7ac8..b9f23400516 100644
--- a/compiler/rustc_mir_build/Cargo.toml
+++ b/compiler/rustc_mir_build/Cargo.toml
@@ -6,7 +6,6 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 itertools = "0.12"
-
 rustc_abi = { path = "../rustc_abi" }
 rustc_apfloat = "0.2.0"
 rustc_arena = { path = "../rustc_arena" }
diff --git a/compiler/rustc_next_trait_solver/Cargo.toml b/compiler/rustc_next_trait_solver/Cargo.toml
index 36d53901d9e..05bcabad02f 100644
--- a/compiler/rustc_next_trait_solver/Cargo.toml
+++ b/compiler/rustc_next_trait_solver/Cargo.toml
@@ -15,6 +15,7 @@ tracing = "0.1"
 # tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 default = ["nightly"]
 nightly = [
     "dep:rustc_data_structures",
@@ -22,3 +23,4 @@ nightly = [
     "rustc_index/nightly",
     "rustc_type_ir/nightly",
 ]
+# tidy-alphabetical-end
diff --git a/compiler/rustc_parse/Cargo.toml b/compiler/rustc_parse/Cargo.toml
index 88f93782de1..0ae0b613fa2 100644
--- a/compiler/rustc_parse/Cargo.toml
+++ b/compiler/rustc_parse/Cargo.toml
@@ -26,5 +26,8 @@ unicode-width = "0.2.0"
 # tidy-alphabetical-end
 
 [dev-dependencies]
+# tidy-alphabetical-start
 termcolor = "1.2"
+# tidy-alphabetical-end
+
 
diff --git a/compiler/rustc_pattern_analysis/Cargo.toml b/compiler/rustc_pattern_analysis/Cargo.toml
index 40d549630ac..a59f7bbeb9e 100644
--- a/compiler/rustc_pattern_analysis/Cargo.toml
+++ b/compiler/rustc_pattern_analysis/Cargo.toml
@@ -6,7 +6,6 @@ edition = "2024"
 [dependencies]
 # tidy-alphabetical-start
 rustc-hash = "2.0.0"
-
 rustc_abi = { path = "../rustc_abi", optional = true }
 rustc_apfloat = "0.2.0"
 rustc_arena = { path = "../rustc_arena", optional = true }
@@ -24,10 +23,13 @@ tracing = "0.1"
 # tidy-alphabetical-end
 
 [dev-dependencies]
+# tidy-alphabetical-start
 tracing-subscriber = { version = "0.3.3", default-features = false, features = ["fmt", "env-filter", "ansi"] }
 tracing-tree = "0.3.0"
+# tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 default = ["rustc"]
 rustc = [
     "dep:rustc_abi",
@@ -43,3 +45,4 @@ rustc = [
     "smallvec/may_dangle",
     "rustc_index/nightly",
 ]
+# tidy-alphabetical-end
diff --git a/compiler/rustc_proc_macro/Cargo.toml b/compiler/rustc_proc_macro/Cargo.toml
index 762acf9a1eb..beb95aa3b52 100644
--- a/compiler/rustc_proc_macro/Cargo.toml
+++ b/compiler/rustc_proc_macro/Cargo.toml
@@ -15,7 +15,11 @@ test = false
 doctest = false
 
 [dependencies]
+# tidy-alphabetical-start
 rustc-literal-escaper = "0.0.5"
+# tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 rustc-dep-of-std = []
+# tidy-alphabetical-end
diff --git a/compiler/rustc_public/Cargo.toml b/compiler/rustc_public/Cargo.toml
index fa782166e4f..70af30c1a5f 100644
--- a/compiler/rustc_public/Cargo.toml
+++ b/compiler/rustc_public/Cargo.toml
@@ -18,7 +18,9 @@ tracing = "0.1"
 # tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 # Provides access to APIs that expose internals of the rust compiler.
 # APIs enabled by this feature are unstable. They can be removed or modified
 # at any point and they are not included in the crate's semantic versioning.
 rustc_internal = []
+# tidy-alphabetical-end
diff --git a/compiler/rustc_sanitizers/Cargo.toml b/compiler/rustc_sanitizers/Cargo.toml
index 66488bc9625..9069d2c233d 100644
--- a/compiler/rustc_sanitizers/Cargo.toml
+++ b/compiler/rustc_sanitizers/Cargo.toml
@@ -4,9 +4,8 @@ version = "0.0.0"
 edition = "2024"
 
 [dependencies]
+# tidy-alphabetical-start
 bitflags = "2.5.0"
-tracing = "0.1"
-twox-hash = "1.6.3"
 rustc_abi = { path = "../rustc_abi" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_hir = { path = "../rustc_hir" }
@@ -14,3 +13,6 @@ rustc_middle = { path = "../rustc_middle" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 rustc_trait_selection = { path = "../rustc_trait_selection" }
+tracing = "0.1"
+twox-hash = "1.6.3"
+# tidy-alphabetical-end
diff --git a/compiler/rustc_symbol_mangling/Cargo.toml b/compiler/rustc_symbol_mangling/Cargo.toml
index 12fe6b719f9..0df9c7682bf 100644
--- a/compiler/rustc_symbol_mangling/Cargo.toml
+++ b/compiler/rustc_symbol_mangling/Cargo.toml
@@ -7,7 +7,6 @@ edition = "2024"
 # tidy-alphabetical-start
 punycode = "0.4.0"
 rustc-demangle = "0.1.21"
-
 rustc_abi = { path = "../rustc_abi" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
diff --git a/compiler/rustc_transmute/Cargo.toml b/compiler/rustc_transmute/Cargo.toml
index 246b66d3d03..e61717e5e9c 100644
--- a/compiler/rustc_transmute/Cargo.toml
+++ b/compiler/rustc_transmute/Cargo.toml
@@ -20,9 +20,11 @@ itertools = "0.12"
 # tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 rustc = [
     "dep:rustc_abi",
     "dep:rustc_hir",
     "dep:rustc_middle",
     "dep:rustc_span",
 ]
+# tidy-alphabetical-end
diff --git a/compiler/rustc_type_ir/Cargo.toml b/compiler/rustc_type_ir/Cargo.toml
index 4bd7bfe79be..e7fee574dd4 100644
--- a/compiler/rustc_type_ir/Cargo.toml
+++ b/compiler/rustc_type_ir/Cargo.toml
@@ -23,14 +23,16 @@ tracing = "0.1"
 # tidy-alphabetical-end
 
 [features]
+# tidy-alphabetical-start
 default = ["nightly"]
 nightly = [
-    "dep:rustc_serialize",
-    "dep:rustc_span",
     "dep:rustc_data_structures",
     "dep:rustc_macros",
+    "dep:rustc_serialize",
+    "dep:rustc_span",
+    "rustc_ast_ir/nightly",
+    "rustc_index/nightly",
     "smallvec/may_dangle",
     "smallvec/union",
-    "rustc_index/nightly",
-    "rustc_ast_ir/nightly",
 ]
+# tidy-alphabetical-end