style: apply shellcheck autofix

Library/Homebrew/cmd/update.sh

@@ -657,7 +657,7 @@ EOS
 
           if [[ "${UPSTREAM_SHA_HTTP_CODE}" == "404" ]]
           then
-            TAP="${DIR#${HOMEBREW_LIBRARY}/Taps/}"
+            TAP="${DIR#"${HOMEBREW_LIBRARY}"/Taps/}"
             echo "${TAP} does not exist! Run \`brew untap ${TAP}\` to remove it." >>"${update_failed_file}"
           else
             echo "Fetching ${DIR} failed!" >>"${update_failed_file}"

Library/Homebrew/completions/bash.erb

@@ -105,7 +105,7 @@ __brew_complete_tapped() {
   for dir in "${taplib}"/*/*
   do
     [[ -d "${dir}" ]] || continue
-    dir="${dir#${taplib}/}"
+    dir="${dir#"${taplib}"/}"
     dir="${dir/homebrew-/}"
     taps="${taps} ${dir}"
   done

bin/brew

@@ -2,6 +2,7 @@
 
 # Fail fast with concise message when not using bash
 # Single brackets is needed here for POSIX compatibility
+# shellcheck disable=SC2292
 if [ -z "${BASH_VERSION:-}" ]
 then
   echo "Error: Bash is required to run brew." >&2

completions/bash/brew

@@ -92,7 +92,7 @@ __brew_complete_tapped() {
   for dir in "${taplib}"/*/*
   do
     [[ -d "${dir}" ]] || continue
-    dir="${dir#${taplib}/}"
+    dir="${dir#"${taplib}"/}"
     dir="${dir/homebrew-/}"
     taps="${taps} ${dir}"
   done