patch 8.1.1280: remarks about functionality not in Vi clutters the help

Problem:    Remarks about functionality not in Vi clutters the help.
Solution:   Move all info about what is new in Vim or already existed in Vi to
            vi_diff.txt.  Remove {not in Vi} remarks. (closes #4268) Add
            "noet" to the help files modeline.  Also include many other help
            file improvements.
diff --git a/runtime/doc/if_ole.txt b/runtime/doc/if_ole.txt
index e734df9..46a8a5f 100644
--- a/runtime/doc/if_ole.txt
+++ b/runtime/doc/if_ole.txt
@@ -1,4 +1,4 @@
-*if_ole.txt*    For Vim version 8.1.  Last change: 2008 Aug 16
+*if_ole.txt*    For Vim version 8.1.  Last change: 2019 May 05
 
 
 		  VIM REFERENCE MANUAL    by Paul Moore
@@ -12,10 +12,8 @@
 4. Registration			|ole-registration|
 5. MS Visual Studio integration	|MSVisualStudio|
 
-{Vi does not have any of these commands}
-
-OLE is only available when compiled with the |+ole| feature.  See
-src/if_ole.INSTALL.
+{only available when compiled with the |+ole| feature.  See
+src/if_ole.INSTALL}
 An alternative is using the client-server communication |clientserver|.
 
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