Ignore another commit only removing wxT() for git-blame purposes

Also tidy up the files with the ignored commits a bit and add a comment
explaining how to produce the entries in this file easily.

.git-blame-ignore-revs

@@ -6,6 +6,15 @@
 # future git-blame invocations, run the following command:
 #
 #   git config blame.ignoreRevsFile .git-blame-ignore-revs
+#
+# When adding entries to this file, please keep them in reverse chronological
+# order (the newest ones are added at the top).
+#
+# You can use
+#
+#   $ git show -s --format='# %s, %cs%n%H%n'
+#
+# incantation to directly create an entry in the format used here.
 
 # Get rid of obsoleted comments, 2023-02-05
 2df05fb915516e0563578e34aec45980be51b1f4
@@ -22,6 +31,9 @@ db31a0161503c6ea4cc461f4e10b67830b7d6b52
 # Remove all trailing spaces, 2019-01-30
 8fbca5cb70c8b647d5bd2cacb1e0a2a00358f351
 
+# Remove more wxT() macros from samples, 2018-09-29
+b70ed2d8c84cadf10bd42fc052a255fac02391e4
+
 # Remove (most) occurrences of wxT() macro from the samples, 2018-09-23
 f58ea625968953ca93585ea7f93dcc07ad032d8f
 
@@ -31,7 +43,7 @@ f58ea625968953ca93585ea7f93dcc07ad032d8f
 # Remove all lines containing cvs/svn "$Id$" keyword.
 3f66f6a5b3583b02c34854556eb83e3a808524ce
 
-# No changes, just removed hard tabs and trailing white space., 2009-08-21)
+# No changes, just removed hard tabs and trailing white space., 2009-08-21
 03647350fc7cd141953c72e0284e928847d30f44
 
 # Globally replace _T() with wxT()., 2009-07-23