Ignore gh-pages in branch list

build_all_branches.sh

@@ -9,7 +9,7 @@ cat > base/_redirects << EOF
 EOF
 
 # Generating documentation for each other branch in a subdirectory
-for BRANCH in $(git branch --remotes --format '%(refname:lstrip=3)' | grep -Ev '^(HEAD|develop)$'); do
+for BRANCH in $(git branch --remotes --format '%(refname:lstrip=3)' | grep -Ev '^(HEAD|develop|gh-pages)$'); do
     echo "$BRANCH" >> base/versions.txt
     git checkout $BRANCH
     node processing