fix(_comp_delimited): prepend prefix to all compreply args

Fixes #552.

Previously prefix was only prepended if COMPREPLY only contained one
argument - this commit fixes it so prefix is prepended to all arguments.

Author: Rogach

bash_completion

@@ -833,7 +833,10 @@ _comp_delimited()
         COMPREPLY=($(compgen "$@" -- "${cur##*"$delimiter"}"))
     fi
 
-    ((${#COMPREPLY[@]} == 1)) && COMPREPLY=(${COMPREPLY/#/$prefix})
+    for ((i = 0; i < ${#COMPREPLY[@]}; i++)); do
+        COMPREPLY[i]=${COMPREPLY[i]/#/$prefix}
+    done
+
     [[ $delimiter != : ]] || __ltrim_colon_completions "$cur"
 }