Add consistency with phrases "meantime" and "mean time"

compiler/rustc_driver_impl/messages.ftl

@@ -2,7 +2,7 @@ driver_impl_ice = the compiler unexpectedly panicked. this is a bug.
 driver_impl_ice_bug_report = we would appreciate a bug report: {$bug_report_url}
 driver_impl_ice_bug_report_internal_feature = using internal features is not supported and expected to cause internal compiler errors when used incorrectly
 driver_impl_ice_bug_report_outdated =
-    it seems that this compiler `{$version}` is outdated, a newer nightly should have been released in the mean time
+    it seems that this compiler `{$version}` is outdated, a newer nightly should have been released in the meantime
     .update = please consider running `rustup update nightly` to update the nightly channel and check if this problem still persists
     .url = if the problem still persists, we would appreciate a bug report: {$bug_report_url}
 driver_impl_ice_exclude_cargo_defaults = some of the compiler flags provided by cargo are hidden

compiler/rustc_lint/src/opaque_hidden_inferred_bound.rs

@@ -20,7 +20,7 @@ declare_lint! {
     /// This functionality was removed in #97346, but then rolled back in #99860
     /// because it caused regressions.
     ///
-    /// We plan on reintroducing this as a hard error, but in the mean time,
+    /// We plan on reintroducing this as a hard error, but in the meantime,
     /// this lint serves to warn and suggest fixes for any use-cases which rely
     /// on this behavior.
     ///

compiler/rustc_llvm/llvm-wrapper/ArchiveWrapper.cpp

@@ -147,7 +147,7 @@ LLVMRustArchiveChildName(LLVMRustArchiveChildConstRef Child, size_t *Size) {
   Expected<StringRef> NameOrErr = Child->getName();
   if (!NameOrErr) {
     // rustc_codegen_llvm currently doesn't use this error string, but it might be
-    // useful in the future, and in the mean time this tells LLVM that the
+    // useful in the future, and in the meantime this tells LLVM that the
     // error was not ignored and that it shouldn't abort the process.
     LLVMRustSetLastError(toString(NameOrErr.takeError()).c_str());
     return nullptr;

src/tools/clippy/clippy_lints/src/misc.rs

@@ -66,7 +66,7 @@ declare_clippy_lint! {
     ///
     /// ### Known problems
     /// The lint does not work properly with desugaring and
-    /// macro, it has been allowed in the mean time.
+    /// macro, it has been allowed in the meantime.
     ///
     /// ### Example
     /// ```no_run

src/tools/clippy/tests/ui-internal/custom_ice_message.stderr

@@ -4,7 +4,7 @@ note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 
 error: the compiler unexpectedly panicked. this is a bug.
 
-note: it seems that this compiler <version> is outdated, a newer nightly should have been released in the mean time
+note: it seems that this compiler <version> is outdated, a newer nightly should have been released in the meantime
   |
   = note: please consider running `rustup update nightly` to update the nightly channel and check if this problem still persists
   = note: if the problem still persists, we would appreciate a bug report: https://github.com/rust-lang/rust-clippy/issues/new?template=ice.yml