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Merge pull request #16575 from atom/ns-null-guard-scope-prefix
Null guard auto-prefixing of `.` to scopes for backward compatibility
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commit
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@ -41,7 +41,7 @@ class ScopeDescriptor
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getScopeChain: ->
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# For backward compatibility, prefix TextMate-style scope names with
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# leading dots (e.g. 'source.js' -> '.source.js').
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if @scopes[0].includes('.')
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if @scopes[0]?.includes('.')
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result = ''
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for scope, i in @scopes
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result += ' ' if i > 0
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