🐎 Skip decoration marker changes if caused by text changes

We’re already updating all decorations when text changes anyway, so
marker changes caused by text changes don’t need to perform updates
again.

src/text-editor-presenter.coffee

@@ -666,6 +666,8 @@ class TextEditorPresenter
 
   decorationMarkerDidChange: (decoration, change) ->
     if decoration.isType('line') or decoration.isType('line-number')
+      return if change.textChanged
+
       intersectsVisibleRowRange = false
       startRow = @computeStartRow()
       endRow = @computeEndRow()
@@ -685,6 +687,8 @@ class TextEditorPresenter
         @updateLineNumbersState() if decoration.isType('line-number')
 
     if decoration.isType('highlight')
+      return if change.textChanged
+
       @updateHighlightState(decoration)
 
     if decoration.isType('overlay')