Allow .git to not be a directory

Author: polytypic

commands/add

@@ -7,7 +7,7 @@ KIND="${1%/}"
 URL="$2"
 BRANCH="$3"
 
-if [ $# -ne 3 ] || [ ! -d .git ] || [[ ! "$KIND" =~ ^(requires|equipment)$ ]]; then
+if [ $# -ne 3 ] || [ ! -e .git ] || [[ ! "$KIND" =~ ^(requires|equipment)$ ]]; then
   CMD="${0##*/}"
   cat << EOF
 Usage: $CMD [requires|equipment] url branch

commands/format

@@ -3,7 +3,7 @@
 # shellcheck source=.settings
 . "${BASH_SOURCE%/*}/.settings"
 
-if [ $# -ne 0 ] || [ ! -d .git ]; then
+if [ $# -ne 0 ] || [ ! -e .git ]; then
   CMD="${0##*/}"
   cat << EOF
 Usage: $CMD