Update how-to-edit-xml-files.md

Replace "double-click" replacement text with "open" per PR #5711
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GitHub Issue: https://github.com/MicrosoftDocs/visualstudio-docs/find/master

Author: ktoliver

docs/xml-tools/how-to-edit-xml-files.md

@@ -16,7 +16,7 @@ The XML editor is the new editor for XML files. It can be used on a stand-alone
 > [!NOTE]
 > XHTML documents are handled by the HTML Editor.
 
-To edit an XML file, select and hold (or double-click) the file you want to edit.
+To edit an XML file, open the file you want to edit.
 
 ## Add a new XML file to a project