code action ranges api doc improvements (microsoft#205771)

doc improvements

Author: justschen

src/vscode-dts/vscode.proposed.codeActionRanges.d.ts

@@ -7,10 +7,8 @@ declare module 'vscode' {
 
 	export interface CodeAction {
 		/**
-		 *
-		 * The range to which this Code Action applies to, which will be highlighted.
-		 *
-		 * Ex: A refactoring action will highlight the range of text that will be affected.
+		 * The ranges to which this Code Action applies to, which will be highlighted.
+		 * For example: A refactoring action will highlight the range of text that will be affected.
 		 */
 		ranges?: Range[];
 	}