Add a shellcheck test, fix or ignore all warnings reported by shellcheck.

reltools/publish_docs.sh

@@ -25,8 +25,8 @@ if [ ! -d "json-c-${release}" ] ; then
 	git clone https://github.com/json-c/json-c "json-c-${release}"
 fi
 
-cd json-c-${release}
-git checkout ${reltag}
+cd "json-c-${release}"
+git checkout "${reltag}"
 if [ ! -e doc/html/index.html ] ; then
 	echo "ERROR: unable to find doc/html/index.html on at version ${reltag} in $(pwd)" 1>&2
 	exit 1
@@ -38,11 +38,11 @@ if [ ! -d json-c-pages ] ; then
 	git clone -b gh-pages https://github.com/json-c/json-c json-c-pages
 fi
 cd json-c-pages
-mkdir -p json-c-${release}
-cp -R ../json-c-${release}/doc json-c-${release}/.
-git add json-c-${release}
+mkdir -p "json-c-${release}"
+cp -R "../json-c-${release}/doc" "json-c-${release}/."
+git add "json-c-${release}"
 rm json-c-current-release
-ln -s json-c-${release} json-c-current-release
+ln -s "json-c-${release}" json-c-current-release
 git commit -a -m "Add the ${release} docs."
 
 # TODO: automate changes to index.html
@@ -51,13 +51,13 @@ Steps to do:
  * Add section with links to new json-c-${release} release.
  * Update versions in the "Current release" section
 EOF
-read -p "Press <enter> to run vi index.html: "
+read -r -p "Press <enter> to run vi index.html: "
 vi index.html
 
 git commit -a -m "Update the doc links to point at ${release}"
 
 cat <<EOF
-cd $(pwd)
+cd ${PWD@Q}
 git log -n1 --name-status
 git log -n1 -p