fix typo

Author: He1pa

compiler/rustc_builtin_macros/messages.ftl

@@ -116,7 +116,7 @@ builtin_macros_env_takes_args = `env!()` takes 1 or 2 arguments
 
 builtin_macros_expected_one_cfg_pattern = expected 1 cfg-pattern
 
-builtin_macros_expected_register_class_or_explict_register = expected register class or explicit register
+builtin_macros_expected_register_class_or_explicit_register = expected register class or explicit register
 
 builtin_macros_export_macro_rules = cannot export macro_rules! macros from a `proc-macro` crate type currently
 

compiler/rustc_builtin_macros/src/asm.rs

@@ -424,7 +424,7 @@ fn parse_reg<'a>(
             ast::InlineAsmRegOrRegClass::Reg(symbol)
         }
         _ => {
-            return Err(p.sess.create_err(errors::ExpectedRegisterClassOrExplictRegister {
+            return Err(p.sess.create_err(errors::ExpectedRegisterClassOrExplicitRegister {
                 span: p.token.span,
             }));
         }

compiler/rustc_builtin_macros/src/errors.rs

@@ -815,8 +815,8 @@ pub(crate) struct TestRunnerNargs {
 }
 
 #[derive(Diagnostic)]
-#[diag(builtin_macros_expected_register_class_or_explict_register)]
-pub(crate) struct ExpectedRegisterClassOrExplictRegister {
+#[diag(builtin_macros_expected_register_class_or_explicit_register)]
+pub(crate) struct ExpectedRegisterClassOrExplicitRegister {
     #[primary_span]
     pub(crate) span: Span,
 }