patch 8.2.0122: readme files still mention MS-DOS
Problem: Readme files still mention MS-DOS.
Solution: Update readme files. (Ken Takata, closes #5486)
diff --git a/READMEdir/README_srcdos.txt b/READMEdir/README_srcdos.txt
index 2904fda..ca016bd 100644
--- a/READMEdir/README_srcdos.txt
+++ b/READMEdir/README_srcdos.txt
@@ -1,12 +1,12 @@
README_srcdos.txt for version 8.2 of Vim: Vi IMproved.
See "README.txt" for general information about Vim.
-See "README_dos.txt" for installation instructions for MS-DOS and MS-Windows.
+See "README_dos.txt" for installation instructions for MS-Windows.
These files are in the runtime archive (vim82rt.zip).
-The DOS source archive contains the files needed to compile Vim on MS-DOS or
-MS-Windows. It is packed for DOS systems, with CR-LF. It also includes the
-VisVim sources.
+The DOS source archive contains the files needed to compile Vim on MS-Windows.
+It is packed for MS-Windows systems, with CR-LF. It also includes the VisVim
+sources.
See "src/INSTALLpc.txt" for instructions on how to compile Vim on the PC.