feat: keep appended newlines in-place when sorting

package.json

@@ -375,6 +375,12 @@
             "description": "Regex for incomplete blocks. `^` and `$` will be expanded to allow comments",
             "scope": "language-overridable",
             "default": "(if|when|else|case|for|foreach|else|elsif|while|def|then|default)\\s*('([^']|(?<=\\\\)')*'|\"([^\"]|(?<=\\\\)\")*\"|`([^`]|(?<=\\\\)`)*`|[A-Za-z_+\\-*/%<>d.,s]*)*\\s*(.*:)?$"
+          },
+          "blocksort.keepAppendedNewlines": {
+            "type": "boolean",
+            "description": "Keep appsended newlines when sorting blocks",
+            "scope": "language-overridable",
+            "default": true
           }
         }
       }

src/providers/ConfigurationProvider.ts

@@ -120,6 +120,10 @@ export default class ConfigurationProvider {
     };
   }
 
+  public static getKeepAppendedNewlines(): boolean {
+    return ConfigurationProvider.getConfiguration().keepAppendedNewlines;
+  }
+
   public static getEnableNaturalSorting(): boolean {
     return ConfigurationProvider.getConfiguration().enableNaturalSorting;
   }

src/providers/StringProcessingProvider.ts

@@ -132,7 +132,7 @@ export default class StringProcessingProvider {
   }
 
   public isIndentIgnoreLine(line: string | LineMeta, document: TextDocument): boolean {
-    if (typeof line != "string") return line.ignoreIndent;
+    if (typeof line != "string") return line.ignoreIndent || !line.hasContent;
 
     const indentIgnoreMarkers = ConfigurationProvider.getIndentIgnoreMarkers(document);
     const comment = commentRegex[this.document.languageId || "default"] || commentRegex.default;