Minor bash completion improvements/fixes

Signed-off-by: Harald Albers <github@albersweb.de>

Author: albers

contrib/completion/bash/docker

@@ -239,7 +239,7 @@ __docker_images() {
 	__docker_q image ls --no-trunc --format "${format%\\n}" $all "$@" | grep -v '<none>$'
 }
 
-# __docker_complete_images appies completion of images based on the current value of `$cur` or
+# __docker_complete_images applies completion of images based on the current value of `$cur` or
 # the value of the optional first option `--cur`, if given.
 # See __docker_images for customization of the returned items.
 __docker_complete_images() {
@@ -1372,10 +1372,7 @@ _docker_container_commit() {
 			if [ "$cword" -eq "$counter" ]; then
 				__docker_complete_containers_all
 				return
-			fi
-			(( counter++ ))
-
-			if [ "$cword" -eq "$counter" ]; then
+			elif [ "$cword" -eq "$((counter + 1))" ]; then
 				__docker_complete_images --repo --tag
 				return
 			fi
@@ -2593,7 +2590,7 @@ _docker_image_history() {
 			COMPREPLY=( $( compgen -W "--format --help --human=false -H=false --no-trunc --quiet -q" -- "$cur" ) )
 			;;
 		*)
-			local counter=$(__docker_pos_first_nonflag)
+			local counter=$(__docker_pos_first_nonflag '--format')
 			if [ "$cword" -eq "$counter" ]; then
 				__docker_complete_images --force-tag --id
 			fi
@@ -2619,11 +2616,9 @@ _docker_image_import() {
 		*)
 			local counter=$(__docker_pos_first_nonflag '--change|-c|--message|-m')
 			if [ "$cword" -eq "$counter" ]; then
+				_filedir
 				return
-			fi
-			(( counter++ ))
-
-			if [ "$cword" -eq "$counter" ]; then
+			elif [ "$cword" -eq "$((counter + 1))" ]; then
 				__docker_complete_images --repo --tag
 				return
 			fi
@@ -2798,10 +2793,7 @@ _docker_image_tag() {
 			if [ "$cword" -eq "$counter" ]; then
 				__docker_complete_images --force-tag --id
 				return
-			fi
-			(( counter++ ))
-
-			if [ "$cword" -eq "$counter" ]; then
+			elif [ "$cword" -eq "$((counter + 1))" ]; then
 				__docker_complete_images --repo --tag
 				return
 			fi