clang-tidy: Use folded-block string for checks

Use a YAML folded-block string literal rather than a quoted literal with
line continuation characters for listing clang-tidy checks. This allows
the values to start on the next line and to be indented, and avoids
needing a closing double-quote and the need to end every line with a
backslash.

.clang-tidy

@@ -1,87 +1,87 @@
 ---
-Checks: "-*,\
+Checks: >
-bugprone-*,\
+  -*,
--bugprone-assignment-in-if-condition,\
+  bugprone-*,
--bugprone-crtp-constructor-accessibility,\
+  -bugprone-assignment-in-if-condition,
--bugprone-derived-method-shadowing-base-method,\
+  -bugprone-crtp-constructor-accessibility,
--bugprone-easily-swappable-parameters,\
+  -bugprone-derived-method-shadowing-base-method,
--bugprone-empty-catch,\
+  -bugprone-easily-swappable-parameters,
--bugprone-exception-escape,\
+  -bugprone-empty-catch,
--bugprone-implicit-widening-of-multiplication-result,\
+  -bugprone-exception-escape,
--bugprone-inc-dec-in-conditions,\
+  -bugprone-implicit-widening-of-multiplication-result,
--bugprone-macro-parentheses,\
+  -bugprone-inc-dec-in-conditions,
--bugprone-multi-level-implicit-pointer-conversion,\
+  -bugprone-macro-parentheses,
--bugprone-narrowing-conversions,\
+  -bugprone-multi-level-implicit-pointer-conversion,
--bugprone-return-const-ref-from-parameter,\
+  -bugprone-narrowing-conversions,
--bugprone-suspicious-stringview-data-usage,\
+  -bugprone-return-const-ref-from-parameter,
--bugprone-switch-missing-default-case,\
+  -bugprone-suspicious-stringview-data-usage,
--bugprone-throwing-static-initialization,\
+  -bugprone-switch-missing-default-case,
--bugprone-too-small-loop-variable,\
+  -bugprone-throwing-static-initialization,
--bugprone-unchecked-optional-access,\
+  -bugprone-too-small-loop-variable,
--bugprone-unchecked-string-to-number-conversion,\
+  -bugprone-unchecked-optional-access,
--bugprone-unused-local-non-trivial-variable,\
+  -bugprone-unchecked-string-to-number-conversion,
--bugprone-unused-return-value,\
+  -bugprone-unused-local-non-trivial-variable,
--bugprone-use-after-move,\
+  -bugprone-unused-return-value,
-misc-*,\
+  -bugprone-use-after-move,
--misc-confusable-identifiers,\
+  misc-*,
--misc-const-correctness,\
+  -misc-confusable-identifiers,
--misc-include-cleaner,\
+  -misc-const-correctness,
--misc-multiple-inheritance,\
+  -misc-include-cleaner,
--misc-non-private-member-variables-in-classes,\
+  -misc-multiple-inheritance,
--misc-no-recursion,\
+  -misc-non-private-member-variables-in-classes,
--misc-override-with-different-visibility,\
+  -misc-no-recursion,
--misc-predictable-rand,\
+  -misc-override-with-different-visibility,
--misc-static-assert,\
+  -misc-predictable-rand,
--misc-use-anonymous-namespace,\
+  -misc-static-assert,
--misc-use-internal-linkage,\
+  -misc-use-anonymous-namespace,
-modernize-*,\
+  -misc-use-internal-linkage,
--modernize-avoid-c-arrays,\
+  modernize-*,
--modernize-avoid-c-style-cast,\
+  -modernize-avoid-c-arrays,
--modernize-concat-nested-namespaces,\
+  -modernize-avoid-c-style-cast,
--modernize-macro-to-enum,\
+  -modernize-concat-nested-namespaces,
--modernize-return-braced-init-list,\
+  -modernize-macro-to-enum,
--modernize-type-traits,\
+  -modernize-return-braced-init-list,
--modernize-unary-static-assert, \
+  -modernize-type-traits,
--modernize-use-emplace,\
+  -modernize-unary-static-assert,
--modernize-use-nodiscard,\
+  -modernize-use-emplace,
--modernize-use-noexcept,\
+  -modernize-use-nodiscard,
--modernize-use-scoped-lock,\
+  -modernize-use-noexcept,
--modernize-use-trailing-return-type,\
+  -modernize-use-scoped-lock,
--modernize-use-transparent-functors,\
+  -modernize-use-trailing-return-type,
-performance-*,\
+  -modernize-use-transparent-functors,
--performance-avoid-endl,\
+  performance-*,
--performance-enum-size,\
+  -performance-avoid-endl,
--performance-unnecessary-copy-initialization,\
+  -performance-enum-size,
--performance-unnecessary-value-param,\
+  -performance-unnecessary-copy-initialization,
-readability-*,\
+  -performance-unnecessary-value-param,
--readability-avoid-nested-conditional-operator,\
+  readability-*,
--readability-avoid-unconditional-preprocessor-if,\
+  -readability-avoid-nested-conditional-operator,
--readability-convert-member-functions-to-static,\
+  -readability-avoid-unconditional-preprocessor-if,
--readability-enum-initial-value,\
+  -readability-convert-member-functions-to-static,
--readability-function-cognitive-complexity,\
+  -readability-enum-initial-value,
--readability-function-size,\
+  -readability-function-cognitive-complexity,
--readability-identifier-length,\
+  -readability-function-size,
--readability-identifier-naming,\
+  -readability-identifier-length,
--readability-implicit-bool-conversion,\
+  -readability-identifier-naming,
--readability-inconsistent-declaration-parameter-name,\
+  -readability-implicit-bool-conversion,
--readability-magic-numbers,\
+  -readability-inconsistent-declaration-parameter-name,
--readability-make-member-function-const,\
+  -readability-magic-numbers,
--readability-math-missing-parentheses,\
+  -readability-make-member-function-const,
--readability-named-parameter,\
+  -readability-math-missing-parentheses,
--readability-redundant-casting,\
+  -readability-named-parameter,
--readability-redundant-parentheses,\
+  -readability-redundant-casting,
--readability-redundant-typename,\
+  -readability-redundant-parentheses,
--readability-simplify-boolean-expr,\
+  -readability-redundant-typename,
--readability-static-accessed-through-instance,\
+  -readability-simplify-boolean-expr,
--readability-suspicious-call-argument,\
+  -readability-static-accessed-through-instance,
--readability-uppercase-literal-suffix,\
+  -readability-suspicious-call-argument,
--readability-use-concise-preprocessor-directives,\
+  -readability-uppercase-literal-suffix,
--readability-use-std-min-max,\
+  -readability-use-concise-preprocessor-directives,
-cmake-*,\
+  -readability-use-std-min-max,
--cmake-ostringstream-use-cmstrcat,\
+  cmake-*,
--cmake-string-concatenation-use-cmstrcat,\
+  -cmake-ostringstream-use-cmstrcat,
--cmake-use-bespoke-enum-class,\
+  -cmake-string-concatenation-use-cmstrcat,
-"
+  -cmake-use-bespoke-enum-class,
 HeaderFilterRegex: 'Source/cm[^/]*\.(h|hxx|cxx)$'
 CheckOptions:
   - key:   modernize-use-default-member-init.UseAssignment