patch 8.2.0319: file missing in distribution, comments outdated

Problem:    File missing in distribution, comments outdated.
Solution:   Correct path of README file.  Update comments.
diff --git a/src/if_python3.c b/src/if_python3.c
index 8c22514..6e4b81a 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -1641,7 +1641,7 @@
 {
     PyObject *result;
     Py_ssize_t len = strlen(str);
-    char *tmp,*p;
+    char *tmp, *p;
 
     tmp = alloc(len + 1);
     p = tmp;