Ugh, add settingsForScopeDescriptor back

It’s used by language mode and autocomplete for different things

src/config.coffee

@@ -707,6 +707,17 @@ class Config
       .join(' ')
     @scopedSettingsStore.getPropertyValue(scopeChain, keyPath)
 
+  # TODO: figure out how to change / remove this. The return value is awkward. 
+  # * language mode uses it for one thing.
+  # * autocomplete uses it for editor.completions
+  settingsForScopeDescriptor: (scopeDescriptor, keyPath) ->
+    scopeChain = scopeDescriptor
+      .map (scope) ->
+        scope = ".#{scope}" unless scope[0] is '.'
+        scope
+      .join(' ')
+    @scopedSettingsStore.getProperties(scopeChain, keyPath)
+
   clearScopedSettings: ->
     @scopedSettingsStore = new ScopedPropertyStore
 

src/language-mode.coffee

@@ -30,11 +30,11 @@ class LanguageMode
   # Returns an {Array} of the commented {Ranges}.
   toggleLineCommentsForBufferRows: (start, end) ->
     scopes = @editor.scopesForBufferPosition([start, 0])
-    properties = atom.config.get(scopes, "editor")
-    return unless properties.commentStart
+    properties = atom.config.settingsForScopeDescriptor(scopes, "editor.commentStart")[0]
+    return unless properties
 
-    commentStartString = properties.commentStart
-    commentEndString = properties.commentEnd
+    commentStartString = _.valueForKeyPath(properties, 'editor.commentStart')
+    commentEndString = _.valueForKeyPath(properties, 'editor.commentEnd')
 
     return unless commentStartString
 

src/syntax.coffee

@@ -57,4 +57,4 @@ class Syntax extends GrammarRegistry
 
   propertiesForScope: (scope, keyPath) ->
     deprecate 'A direct (but private) replacement is available at atom.config.scopedSettingsForScopeDescriptor().'
-    atom.config.scopedSettingsForScopeDescriptor(scope, keyPath)
+    atom.config.settingsForScopeDescriptor(scope, keyPath)