Only use exclude to exclude lines with words that result in false pos…

…itives for codespell.

.codespellexclude

@@ -5,3 +5,11 @@
         <variable units="dimensionless" name="ths"/>
                 auto ue = std::any_cast<libcellml::UnitsItemPtr>(expectedItems[id][index].second);
 * Fixed typos: occurence -> occurRence by `@agarny <https://github.com/agarny>`_ [`#794 <https://github.com/cellml/libcellml/pull/794>`_].
+    std::vector<size_t> mErrors;
+        mErrors.push_back(index);
+    mErrors.erase(mErrors.begin() + ptrdiff_t(index));
+    mIssues.erase(mIssues.begin() + ptrdiff_t(mErrors.at(index)));
+    mErrors.clear();
+    if (index < pFunc()->mErrors.size()) {
+        issue = pFunc()->mIssues.at(pFunc()->mErrors.at(index));
+    return pFunc()->mErrors.size();

.github/workflows/spell-check.yml

@@ -19,4 +19,3 @@ jobs:
           check_filenames: true
           skip: ./.git,./tests/gtest/include/gtest/gtest.h,./tests/gtest/src/gtest-all.cc,./src/dtds/mathml2/*
           exclude_file: .codespellexclude
-          ignore_words_list: mErrors