Color Scheme rules applied differently to Sublime

[keith-hall]

In Sublime Text, given a simple color scheme like:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>name</key>
    <string>Test</string>
    <key>settings</key>
    <array>
        <dict>
            <key>settings</key>
            <dict>
                <key>background</key>
                <string>#2b303b</string>
                <key>foreground</key>
                <string>#c0c5ce</string>
            </dict>
        </dict>
        <dict>
            <key>scope</key>
            <string>comment</string>
            <key>settings</key>
            <dict>
                <key>background</key>
                <string>#FD971F</string>
                <key>foreground</key>
                <string>#AAAAAA</string>
            </dict>
        </dict>
        <dict>
            <key>scope</key>
            <string>comment.line</string>
            <key>settings</key>
            <dict>
                <key>foreground</key>
                <string>#FFFCFF</string>
            </dict>
        </dict>
    </array>
</dict>
</plist>

and some sample Python text like # test, the background rule from the comment scope selector applies, and the foreground rule from the comment.line scope selector applies, as can be seen by:

>>> view.style_for_scope('comment.line')
{'source_column': -1, 'source_file': 'Packages/User/test.tmTheme', 'background': '#fd971f', 'foreground': '#fffcff', 'italic': False, 'source_line': -1, 'bold': False}

This is because Sublime applies rules from all scope selectors in the color scheme that match the scope stack, in ascending order of their score, so that the rules with a higher score override those with a lower score.
In syntect, currently it just uses the rule with the highest matching score, and so the background from comment isn't applied.

<pre style="background-color:#2b303b;">
<span style="color:#fffcff;"># test</span><!-- missing `background-color:#fd971f` -->
</pre>