Restore precedence of custom SCA template snippets
Restore precedence of custom SCA template snippets

Recently, I changed the scope of the built-in language-sca snippets from
.text.html.sca.tpl to .text.html.mustache.sca.tpl. Making that changed
required that I use the same new scope for my custom SCA template
snippets, otherwise they will be overridden by the bundled snippets (as
has been the case).

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