bpo-32297: Few misspellings found in Python source code comments. (#4803)

* Fix multiple typos in code comments

* Add spacing in comments (test_logging.py, test_math.py)

* Fix spaces at the beginning of comments in test_logging.py
diff --git a/Lib/xml/etree/ElementTree.py b/Lib/xml/etree/ElementTree.py
index 7caef55..8727704 100644
--- a/Lib/xml/etree/ElementTree.py
+++ b/Lib/xml/etree/ElementTree.py
@@ -1062,7 +1062,7 @@
     # escape character data
     try:
         # it's worth avoiding do-nothing calls for strings that are
-        # shorter than 500 character, or so.  assume that's, by far,
+        # shorter than 500 characters, or so.  assume that's, by far,
         # the most common case in most applications.
         if "&" in text:
             text = text.replace("&", "&")