Going ahead with the switch to tabs. This is a major coding standards change! If any unusual parser bugs show up, check this changeset. Converted all .php, .js, .tpl, .css, and .json files and did basic testing.
<!-- Enano CMS - IIS7 Rewrite support (installer's test scenario) -->
<configuration>
<configSections>
<sectionGroup name="rewriteRules">
<section name="rules" overrideModeDefault="Allow" />
</sectionGroup>
</configSections>
<system.webServer>
<rewrite>
<rules>
<rule name="Installation - test requests from installer UI">
<match url="(.*)" ignoreCase="false" />
<conditions>
<add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" negate="true" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" negate="true" />
</conditions>
<action type="Rewrite" url="install.php?do=modrewrite_test&str={R:1}" appendQueryString="false" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>