Indexed Symbol List Sections.tmPreferences
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>scope</key>
<string>source.rainmeter entity.name.section.rainmeter</string>
<key>settings</key>
<dict>
<key>showInIndexedSymbolList</key>
<integer>1</integer>
<!-- <key>symbolTransformation</key>
<string>
s/^\s*\[(\s*[^\[\]\s]*\s*)\]\s*$/$1/g;
</string> -->
</dict>
</dict>
</plist>