run spellcheck as a tidy extra check in ci

Author: lolbinarycat

compiler/rustc_next_trait_solver/src/canonicalizer.rs

@@ -27,7 +27,7 @@ enum CanonicalizeInputKind {
     ParamEnv,
     /// When canonicalizing predicates, we don't keep `'static`. If we're
     /// currently outside of the trait solver and canonicalize the root goal
-    /// during HIR typeck, we replace each occurance of a region with a
+    /// during HIR typeck, we replace each occurrence of a region with a
     /// unique region variable. See the comment on `InferCtxt::in_hir_typeck`
     /// for more details.
     Predicate { is_hir_typeck_root_goal: bool },

src/ci/docker/host-x86_64/tidy/Dockerfile

@@ -45,4 +45,4 @@ RUN bash -c 'npm install -g eslint@$(cat /tmp/eslint.version)'
 # NOTE: intentionally uses python2 for x.py so we can test it still works.
 # validate-toolstate only runs in our CI, so it's ok for it to only support python3.
 ENV SCRIPT TIDY_PRINT_DIFF=1 python2.7 ../x.py test --stage 0 \
-  src/tools/tidy tidyselftest --extra-checks=py,cpp,js
+  src/tools/tidy tidyselftest --extra-checks=py,cpp,js,spellcheck

src/librustdoc/html/static/js/main.js

@@ -1529,7 +1529,7 @@ function preLoadCss(cssUrl) {
             ["⏎", "Go to active search result"],
             ["+", "Expand all sections"],
             ["-", "Collapse all sections"],
-            // for the sake of brevity, we don't say "inherint impl blocks",
+            // for the sake of brevity, we don't say "inherit impl blocks",
             // although that would be more correct,
             // since trait impl blocks are collapsed by -
             ["_", "Collapse all sections, including impl blocks"],