- Reindent a confusingly indented piece of code (no intended code changes

   there)
 - Add missing DECREFs of inner-scope 'temp' variable
 - Add various missing DECREFs by changing 'return NULL' into 'goto onError'
 - Avoid double DECREF when last _PyUnicode_Resize() fails

Coverity found one of the missing DECREFs, but oddly enough not the others.

Objects/unicodeobject.c

@@ -7172,11 +7172,13 @@ PyObject *PyUnicode_Format(PyObject *format,
 		reslen += rescnt;
 		if (reslen < 0) {
 		    Py_XDECREF(temp);
-		    Py_DECREF(result);
-		    return PyErr_NoMemory();
+		    PyErr_NoMemory();
+		    goto onError;
+		}
+		if (_PyUnicode_Resize(&result, reslen) < 0) {
+		    Py_XDECREF(temp);
+		    goto onError;
 		}
-		if (_PyUnicode_Resize(&result, reslen) < 0)
-		    return NULL;
 		res = PyUnicode_AS_UNICODE(result)
 		    + reslen - rescnt;
 	    }
@@ -7226,6 +7228,7 @@ PyObject *PyUnicode_Format(PyObject *format,
 	    if (dict && (argidx < arglen) && c != '%') {
 		PyErr_SetString(PyExc_TypeError,
 				"not all arguments converted during string formatting");
+                Py_XDECREF(temp);
 		goto onError;
 	    }
 	    Py_XDECREF(temp);
@@ -7237,12 +7240,12 @@ PyObject *PyUnicode_Format(PyObject *format,
 	goto onError;
     }
 
+    if (_PyUnicode_Resize(&result, reslen - rescnt) < 0)
+	goto onError;
     if (args_owned) {
 	Py_DECREF(args);
     }
     Py_DECREF(uformat);
-    if (_PyUnicode_Resize(&result, reslen - rescnt) < 0)
-	goto onError;
     return (PyObject *)result;
 
  onError: