structured renderer: fix closing json tags when rendering with no symbols (#32642)

internal/command/jsonformat/computed/renderers/primitive.go

@@ -217,7 +217,7 @@ func (renderer primitiveRenderer) renderStringDiffAsJson(diff computed.Diff, ind
 	}
 
 	if strings.Contains(renderedJsonDiff, "\n") {
-		return fmt.Sprintf("jsonencode(%s\n%s%s%s%s\n%s)%s", whitespace, formatIndent(indent+1), writeDiffActionSymbol(action, opts), renderedJsonDiff, replace, formatIndent(indent+1), nullSuffix(diff.Action, opts))
+		return fmt.Sprintf("jsonencode(%s\n%s%s%s%s\n%s%s)%s", whitespace, formatIndent(indent+1), writeDiffActionSymbol(action, opts), renderedJsonDiff, replace, formatIndent(indent), writeDiffActionSymbol(plans.NoOp, opts), nullSuffix(diff.Action, opts))
 	}
 	return fmt.Sprintf("jsonencode(%s)%s%s", renderedJsonDiff, whitespace, replace)
 }

internal/command/jsonformat/computed/renderers/renderer_test.go

@@ -2062,6 +2062,23 @@ jsonencode(
       + 0,
       + 1,
     ]
+`,
+		},
+		"json_string_no_symbols": {
+			diff: computed.Diff{
+				Renderer: Primitive("{\"key\":\"value\"}", "{\"key\":\"value\"}", cty.String),
+				Action:   plans.NoOp,
+			},
+			opts: computed.RenderHumanOpts{
+				HideDiffActionSymbols: true,
+				ShowUnchangedChildren: true,
+			},
+			expected: `
+jsonencode(
+    {
+        key = "value"
+    }
+)
 `,
 		},
 	}