--- json-stream-printer.sml.orig	2020-04-08 19:00:10.000000000 +0200
+++ json-stream-printer.sml	2020-07-03 15:23:14.218708000 +0200
@@ -70,7 +70,7 @@
 		then TextIO.output(strm, String.extract(tenSpaces, 10-n, NONE))
 		else (TextIO.output(strm, tenSpaces); prIndent(n-10))
 	  in
-	    prIndent ((!indent+offset) * 2)
+	    prIndent (!indent+offset)
 	  end
 
     fun incIndent (P{indent, ...}, n) = indent := !indent + n;
@@ -108,14 +108,14 @@
 	  fun tr (i, chrs) = (case getWChar i
 		 of SOME(wchr, i) => if (wchr <= 0w126)
 		      then (case UTF8.toAscii wchr
-			 of #"\"" => "\\\""
-			  | #"\\" => "\\\\"
-			  | #"/" => "\\/"
-			  | #"\b" => "\\b"
-			  | #"\f" => "\\f"
-			  | #"\n" => "\\n"
-			  | #"\r" => "\\r"
-			  | #"\t" => "\\t"
+			 of #"\"" => tr(i, "\\\"" :: chrs)
+			  | #"\\" => tr(i, "\\\\" :: chrs)
+			  | #"/" => tr(i, "\\/" :: chrs)
+			  | #"\b" => tr(i, "\\b" :: chrs)
+			  | #"\f" => tr(i, "\\f" :: chrs)
+			  | #"\n" => tr(i, "\\n" :: chrs)
+			  | #"\r" => tr(i, "\\r" :: chrs)
+			  | #"\t" => tr(i, "\\t" :: chrs)
 			  | c => if (wchr < 0w32)
 			      then tr(i, F.format "\\u%04x" [F.WORD wchr] :: chrs)
 			      else tr(i, str c :: chrs)
@@ -131,7 +131,7 @@
 	   of CLOSED => raise Fail "closed printer"
 	    | _ => (
 		optComma p;
-		pr (p, "{"); incIndent(p, 2); nl p;
+		pr (p, "{"); incIndent(p, 1); nl p;
 		ctx := FIRST(OBJECT(!ctx)))
 	  (* end case *))
 
@@ -148,7 +148,7 @@
     fun endObject (p as P{ctx, ...}) = let
 	  fun prEnd ctx' = (
 		ctx := ctx';
-		indent(p, ~1); pr(p, "}"); decIndent (p, 2))
+		decIndent (p, 1); indent(p, 0); pr(p, "}"))
 	  in
 	    case !ctx
 	     of CLOSED => raise Fail "closed printer"
@@ -163,14 +163,14 @@
 	   of CLOSED => raise Fail "closed printer"
 	    | _ => (
 		optComma p;
-		pr (p, "["); incIndent(p, 2); nl p;
+		pr (p, "["); incIndent(p, 1); nl p;
 		ctx := FIRST(ARRAY(!ctx)))
 	  (* end case *))
 
     fun endArray (p as P{ctx, ...}) = let
 	  fun prEnd ctx' = (
 		ctx := ctx';
-		indent(p, ~1); pr(p, "]"); decIndent (p, 2))
+		decIndent (p, 1); indent(p, 0); pr(p, "]"))
 	  in
 	    case !ctx
 	     of CLOSED => raise Fail "closed printer"