Merge typo/grammar fixes from 3.3.

Misc/NEWS

@@ -41,7 +41,7 @@ Library
   functions now conform to PEP 3333 when handle non-ASCII URLs.
 
 - Issue #19097: Raise the correct Exception when cgi.FieldStorage is given an
-  Invalid fileobj.
+  invalid fileobj.
 
 - Issue #20152: Ported Python/import.c over to Argument Clinic.
 
@@ -447,7 +447,7 @@ Tests
 
 - Issue #19320: test_tcl no longer fails when wantobjects is false.
 
-- Issue #19919: Fix flacky SSL test. connect_ex() sometimes returns
+- Issue #19919: Fix flaky SSL test. connect_ex() sometimes returns
   EWOULDBLOCK on Windows or VMs hosted on Windows.
 
 - Issue #19912: Added tests for ntpath.splitunc().
@@ -496,7 +496,7 @@ Documentation
 - Issue #20253: Fixed a typo in the ipaddress docs that advertised an
   illegal attribute name.  Found by INADA Naoki.
 
-- Issue #18840: Introduce the json module in the tutorial, and deemphasize
+- Issue #18840: Introduce the json module in the tutorial, and de-emphasize
   the pickle module.
 
 - Issue #19845: Updated the Compiling Python on Windows section.