diff --git a/doc/developer/old-documents/VT100/db2.pl.txt b/doc/developer/old-documents/VT100/db2.pl.txt
old mode 100755
new mode 100644
diff --git a/doc/developer/old-documents/VT100/genPl.pl.txt b/doc/developer/old-documents/VT100/genPl.pl.txt
old mode 100755
new mode 100644
index 0a3bb648..78880cc7
--- a/doc/developer/old-documents/VT100/genPl.pl.txt
+++ b/doc/developer/old-documents/VT100/genPl.pl.txt
@@ -18,7 +18,7 @@ my $test = 0;
 
 # Data Model ------------------------------------------------------------------
 
-# This is currently pretty wierd.
+# This is currently pretty weird.
 #
 # Empirically, we have
 #
diff --git a/doc/developer/old-documents/VT100/genTC.pl.txt b/doc/developer/old-documents/VT100/genTC.pl.txt
old mode 100755
new mode 100644
index a3a7c566..55609436
--- a/doc/developer/old-documents/VT100/genTC.pl.txt
+++ b/doc/developer/old-documents/VT100/genTC.pl.txt
@@ -18,7 +18,7 @@ my $test = 0;
 
 # Data Model ------------------------------------------------------------------
 
-# This is currently pretty wierd.
+# This is currently pretty weird.
 #
 # Empirically, we have
 #
diff --git a/doc/developer/old-documents/VT100/t.pl.txt b/doc/developer/old-documents/VT100/t.pl.txt
old mode 100755
new mode 100644
index b0d9dc8e..57e80421
--- a/doc/developer/old-documents/VT100/t.pl.txt
+++ b/doc/developer/old-documents/VT100/t.pl.txt
@@ -1,6 +1,6 @@
 #!/usr/bin/perl
 
-# This script is here only as a pattern for maintainance works.
+# This script is here only as a pattern for maintenance works.
 # It has changing contents and is of no use to anyone but me.
 
 $source = "Table.Codes";