exclude file type from textmate bundle macros

I would like to know how to code TextMate bundles and how to exclude a file from a certain bundle.

Can you answer the question in my comment on this 开发者_如何学运维textmate whitespace bundle issue?

Go to Bundles -> Bundle Editor -> Show Bundle Editor Expand the Uber Glory bundle and select Convert Tabs to Spaces... In the field labeled Scope Selector, put - text.html.markdown

This should make the following additions to the file: /Macros/Convert Tabs to Spaces, Strip whitespace, save.tmMacro

@@ -51,6 +51,8 @@
        <string>@s</string>
        <key>name</key>
        <string>Convert Tabs to Spaces, Strip whitespace, save</string>
+       <key>scope</key>
+       <string>- text.html.markdown</string>
        <key>uuid</key>
        <string>D6844EF1-342B-46D9-A687-CB402F7F4209</string>
 </dict>

Note: If you'd rather make the change by editing the file, make sure to select Bundles -> Bundle Editor -> Reload Bundles