don't uppercase error messages

compiler/rustc_attr_parsing/messages.ftl

@@ -151,7 +151,7 @@ attr_parsing_unrecognized_repr_hint =
 attr_parsing_unstable_cfg_target_compact =
     compact `cfg(target(..))` is experimental and subject to change
 
-attr_parsing_unstable_feature_bound_incompatible_stability = Item annotated with `#[unstable_feature_bound]` should not be stable
+attr_parsing_unstable_feature_bound_incompatible_stability = item annotated with `#[unstable_feature_bound]` should not be stable
     .help = If this item is meant to be stable, do not use any functions annotated with `#[unstable_feature_bound]`. Otherwise, mark this item as unstable with `#[unstable]`
 
 attr_parsing_unsupported_literal_cfg_boolean =

compiler/rustc_codegen_ssa/messages.ftl

@@ -40,15 +40,15 @@ codegen_ssa_dynamic_linking_with_lto =
     .note = only 'staticlib', 'bin', and 'cdylib' outputs are supported with LTO
 
 codegen_ssa_error_calling_dlltool =
-    Error calling dlltool '{$dlltool_path}': {$error}
+    error calling dlltool '{$dlltool_path}': {$error}
 
 codegen_ssa_error_creating_import_library =
-    Error creating import library for {$lib_name}: {$error}
+    error creating import library for {$lib_name}: {$error}
 
 codegen_ssa_error_creating_remark_dir = failed to create remark directory: {$error}
 
 codegen_ssa_error_writing_def_file =
-    Error writing .DEF file: {$error}
+    error writing .DEF file: {$error}
 
 codegen_ssa_expected_name_value_pair = expected name value pair
 
@@ -264,9 +264,9 @@ codegen_ssa_shuffle_indices_evaluation = could not evaluate shuffle_indices at c
 
 codegen_ssa_specify_libraries_to_link = use the `-l` flag to specify native libraries to link
 
-codegen_ssa_static_library_native_artifacts = Link against the following native artifacts when linking against this static library. The order and any duplication can be significant on some platforms.
+codegen_ssa_static_library_native_artifacts = link against the following native artifacts when linking against this static library. The order and any duplication can be significant on some platforms.
 
-codegen_ssa_static_library_native_artifacts_to_file = Native artifacts to link against have been written to {$path}. The order and any duplication can be significant on some platforms.
+codegen_ssa_static_library_native_artifacts_to_file = native artifacts to link against have been written to {$path}. The order and any duplication can be significant on some platforms.
 
 codegen_ssa_stripping_debug_info_failed = stripping debug info with `{$util}` failed: {$status}
     .note = {$output}
@@ -364,13 +364,13 @@ codegen_ssa_unable_to_run = unable to run `{$util}`: {$error}
 
 codegen_ssa_unable_to_run_dsymutil = unable to run `dsymutil`: {$error}
 
-codegen_ssa_unable_to_write_debugger_visualizer = Unable to write debugger visualizer file `{$path}`: {$error}
+codegen_ssa_unable_to_write_debugger_visualizer = unable to write debugger visualizer file `{$path}`: {$error}
 
 codegen_ssa_unexpected_parameter_name = unexpected parameter name
     .label = expected `{$prefix_nops}` or `{$entry_nops}`
 
 codegen_ssa_unknown_archive_kind =
-    Don't know how to build archive of type: {$kind}
+    don't know how to build archive of type: {$kind}
 
 codegen_ssa_unknown_ctarget_feature =
     unknown and unstable feature specified for `-Ctarget-feature`: `{$feature}`

compiler/rustc_const_eval/messages.ftl

@@ -457,7 +457,7 @@ const_eval_validation_failure =
     it is undefined behavior to use this value
 
 const_eval_validation_failure_note =
-    The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+    the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
 
 const_eval_validation_front_matter_invalid_value = constructing invalid value
 const_eval_validation_front_matter_invalid_value_with_path = constructing invalid value at {$path}

compiler/rustc_driver_impl/messages.ftl

@@ -14,7 +14,7 @@ driver_impl_ice_version = rustc {$version} running on {$triple}
 
 driver_impl_rlink_corrupt_file = corrupt metadata encountered in `{$file}`
 
-driver_impl_rlink_empty_version_number = The input does not contain version number
+driver_impl_rlink_empty_version_number = the input does not contain version number
 
 driver_impl_rlink_encoding_version_mismatch = .rlink file was produced with encoding version `{$version_array}`, but the current version is `{$rlink_version}`
 
@@ -24,6 +24,6 @@ driver_impl_rlink_rustc_version_mismatch = .rlink file was produced by rustc ver
 
 driver_impl_rlink_unable_to_read = failed to read rlink file: `{$err}`
 
-driver_impl_rlink_wrong_file_type = The input does not look like a .rlink file
+driver_impl_rlink_wrong_file_type = the input does not look like a .rlink file
 
 driver_impl_unstable_feature_usage = cannot dump feature usage metrics: {$error}

compiler/rustc_parse/messages.ftl

@@ -58,7 +58,7 @@ parse_async_use_order_incorrect = the order of `use` and `async` is incorrect
 parse_at_dot_dot_in_struct_pattern = `@ ..` is not supported in struct patterns
     .suggestion = bind to each field separately or, if you don't need them, just remove `{$ident} @`
 
-parse_at_in_struct_pattern = Unexpected `@` in struct pattern
+parse_at_in_struct_pattern = unexpected `@` in struct pattern
     .note = struct patterns use `field: pattern` syntax to bind to fields
     .help = consider replacing `new_name @ field_name` with `field_name: new_name` if that is what you intended
 

compiler/rustc_query_system/messages.ftl

@@ -18,8 +18,8 @@ query_system_cycle_usage = cycle used when {$usage}
 query_system_increment_compilation = internal compiler error: encountered incremental compilation error with {$dep_node}
     .help = This is a known issue with the compiler. Run {$run_cmd} to allow your project to compile
 
-query_system_increment_compilation_note1 = Please follow the instructions below to create a bug report with the provided information
-query_system_increment_compilation_note2 = See <https://github.com/rust-lang/rust/issues/84970> for more information
+query_system_increment_compilation_note1 = please follow the instructions below to create a bug report with the provided information
+query_system_increment_compilation_note2 = see <https://github.com/rust-lang/rust/issues/84970> for more information
 
 query_system_overflow_note = query depth increased by {$depth} when {$desc}
 

src/doc/rustc/src/command-line-arguments/print-options.md

@@ -184,7 +184,7 @@ Example:
 
 ```bash
 $ rustc --print native-static-libs --crate-type staticlib a.rs
-note: Link against the following native artifacts when linking against this static library. The order and any duplication can be significant on some platforms.
+note: link against the following native artifacts when linking against this static library. The order and any duplication can be significant on some platforms.
 
 note: native-static-libs: -lgcc_s -lutil [REDACTED] -lpthread -lm -ldl -lc
 ```

tests/run-make/separate-link-fail/rmake.rs

@@ -11,5 +11,5 @@ fn main() {
         .arg("-Zlink-only")
         .input("foo.rs")
         .run_fail()
-        .assert_stderr_contains("The input does not look like a .rlink file");
+        .assert_stderr_contains("the input does not look like a .rlink file");
 }

tests/ui/codegen/empty-static-libs-issue-108825.rs

@@ -15,4 +15,4 @@ fn panic(_info: &core::panic::PanicInfo) -> ! {
 }
 
 //~? NOTE native-static-libs:
-//~? NOTE Link against the following native artifacts when linking against this static library
+//~? NOTE link against the following native artifacts when linking against this static library

tests/ui/const-generics/min_const_generics/invalid-patterns.32bit.stderr

@@ -14,7 +14,7 @@ error[E0080]: constructing invalid value: encountered 0x42, but expected a boole
 LL |   get_flag::<{ unsafe { bool_raw.boolean } }, 'z'>();
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
-   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 1, align: 1) {
                42                                              │ B
            }
@@ -25,7 +25,7 @@ error[E0080]: constructing invalid value: encountered 0x42, but expected a boole
 LL |   get_flag::<{ unsafe { bool_raw.boolean } }, { unsafe { char_raw.character } }>();
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
-   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 1, align: 1) {
                42                                              │ B
            }

tests/ui/const-generics/min_const_generics/invalid-patterns.64bit.stderr

@@ -14,7 +14,7 @@ error[E0080]: constructing invalid value: encountered 0x42, but expected a boole
 LL |   get_flag::<{ unsafe { bool_raw.boolean } }, 'z'>();
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
-   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 1, align: 1) {
                42                                              │ B
            }
@@ -25,7 +25,7 @@ error[E0080]: constructing invalid value: encountered 0x42, but expected a boole
 LL |   get_flag::<{ unsafe { bool_raw.boolean } }, { unsafe { char_raw.character } }>();
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ it is undefined behavior to use this value
    |
-   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: 1, align: 1) {
                42                                              │ B
            }