git-prompt: rename `upstream` to `upstream_type`

In `__git_ps1_show_upstream` rename the variable `upstream` to
`upstream_type`. This allows `__git_ps1_show_upstream` to reference a
variable named `upstream` that is declared `local` in `__git_ps1`, which
calls `__git_ps1_show_upstream`.

Signed-off-by: Justin Donnelly <justinrdonnelly@gmail.com>
Reviewed-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/completion/git-prompt.sh

@@ -115,7 +115,7 @@ __git_ps1_show_upstream ()
 {
 	local key value
 	local svn_remote svn_url_pattern count n
-	local upstream=git legacy="" verbose="" name=""
+	local upstream_type=git legacy="" verbose="" name=""
 
 	svn_remote=()
 	# get some config options from git-config
@@ -132,7 +132,7 @@ __git_ps1_show_upstream ()
 		svn-remote.*.url)
 			svn_remote[$((${#svn_remote[@]} + 1))]="$value"
 			svn_url_pattern="$svn_url_pattern\\|$value"
-			upstream=svn+git # default upstream is SVN if available, else git
+			upstream_type=svn+git # default upstream type is SVN if available, else git
 			;;
 		esac
 	done <<< "$output"
@@ -141,16 +141,16 @@ __git_ps1_show_upstream ()
 	local option
 	for option in ${GIT_PS1_SHOWUPSTREAM}; do
 		case "$option" in
-		git|svn) upstream="$option" ;;
+		git|svn) upstream_type="$option" ;;
 		verbose) verbose=1 ;;
 		legacy)  legacy=1  ;;
 		name)    name=1 ;;
 		esac
 	done
 
-	# Find our upstream
-	case "$upstream" in
-	git)    upstream="@{upstream}" ;;
+	# Find our upstream type
+	case "$upstream_type" in
+	git)    upstream_type="@{upstream}" ;;
 	svn*)
 		# get the upstream from the "git-svn-id: ..." in a commit message
 		# (git-svn uses essentially the same procedure internally)
@@ -167,12 +167,12 @@ __git_ps1_show_upstream ()
 
 			if [[ -z "$svn_upstream" ]]; then
 				# default branch name for checkouts with no layout:
-				upstream=${GIT_SVN_ID:-git-svn}
+				upstream_type=${GIT_SVN_ID:-git-svn}
 			else
-				upstream=${svn_upstream#/}
+				upstream_type=${svn_upstream#/}
 			fi
-		elif [[ "svn+git" = "$upstream" ]]; then
-			upstream="@{upstream}"
+		elif [[ "svn+git" = "$upstream_type" ]]; then
+			upstream_type="@{upstream}"
 		fi
 		;;
 	esac
@@ -180,11 +180,11 @@ __git_ps1_show_upstream ()
 	# Find how many commits we are ahead/behind our upstream
 	if [[ -z "$legacy" ]]; then
 		count="$(git rev-list --count --left-right \
-				"$upstream"...HEAD 2>/dev/null)"
+				"$upstream_type"...HEAD 2>/dev/null)"
 	else
 		# produce equivalent output to --count for older versions of git
 		local commits
-		if commits="$(git rev-list --left-right "$upstream"...HEAD 2>/dev/null)"
+		if commits="$(git rev-list --left-right "$upstream_type"...HEAD 2>/dev/null)"
 		then
 			local commit behind=0 ahead=0
 			for commit in $commits
@@ -229,7 +229,7 @@ __git_ps1_show_upstream ()
 		esac
 		if [[ -n "$count" && -n "$name" ]]; then
 			__git_ps1_upstream_name=$(git rev-parse \
-				--abbrev-ref "$upstream" 2>/dev/null)
+				--abbrev-ref "$upstream_type" 2>/dev/null)
 			if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
 				p="$p \${__git_ps1_upstream_name}"
 			else