Fix handling of descriptions for bash v3 (#1735)

Fixes #1734

Tab characters that introduce completion descriptions weren't properly
being handled with bash v3.  This change fixes that.

Signed-off-by: Marc Khouzam <marc.khouzam@gmail.com>

bash_completionsV2.go

@@ -219,7 +219,7 @@ __%[1]s_handle_standard_completion_case() {
     local tab=$'\t' comp
 
     # Short circuit to optimize if we don't have descriptions
-    if [[ ${completions[*]} != *$tab* ]]; then
+    if [[ "${completions[*]}" != *$tab* ]]; then
         IFS=$'\n' read -ra COMPREPLY -d '' < <(compgen -W "${completions[*]}" -- "$cur")
         return 0
     fi