Renamed src/annex-b-fns/*-{ exsting -> existing }-*.case

src/annex-b-fns/eval-func-existing-block-fn-no-init.case

src/annex-b-fns/eval-func-existing-block-fn-update.case

src/annex-b-fns/eval-func-existing-fn-no-init.case

src/annex-b-fns/eval-func-existing-fn-update.case

src/annex-b-fns/eval-func-existing-var-no-init.case

src/annex-b-fns/eval-func-existing-var-update.case

src/annex-b-fns/eval-global-existing-block-fn-no-init.case

src/annex-b-fns/eval-global-existing-block-fn-update.case

src/annex-b-fns/eval-global-existing-fn-no-init.case

src/annex-b-fns/eval-global-existing-fn-update.case

src/annex-b-fns/eval-global-existing-global-init.case

src/annex-b-fns/eval-global-existing-global-update.case

src/annex-b-fns/eval-global-existing-var-no-init.case

src/annex-b-fns/eval-global-existing-var-update.case

src/annex-b-fns/func-existing-block-fn-no-init.case

src/annex-b-fns/func-existing-block-fn-update.case

src/annex-b-fns/func-existing-fn-no-init.case

src/annex-b-fns/func-existing-fn-update.case

src/annex-b-fns/func-existing-var-no-init.case

src/annex-b-fns/func-existing-var-update.case