git:track: Fix unnecessary subshell launch

While at it, modify the formatting of the line above slightly.

.config/zsh/autoload/git/git-track

@@ -22,9 +22,8 @@ git for-each-ref --format='%(upstream),%(refname)' refs/heads "${@/#/refs/remote
 		s:,/:,:g
 		s:(^|\n)([^,]+),\n\2:\1\2:g
 		s:(^|\n)([^/,]*)([^\n]*\n\2(,|/))*:\n,\n&:g
-		s:\n,\n+$:\n:
-	  ' \
-	| (echo remote,local; cat) \
+		s:\n,\n+$:\n:' \
+	| { echo remote,local; cat; } \
 	| sed -E 's:(.*),(.*):\2,\1:g; s:^,: ,:; s:,$:, :' \
 	| column -ts, \
 	| sed '2d; 1{p;s/./―/g}'