Apply use extension

Also:
 * Fix wording in KDoc.

Author: alexander-yevsyukov

buildSrc/src/main/kotlin/io/spine/gradle/report/pom/PomFormatting.kt

@@ -92,7 +92,7 @@ internal object PomFormatting {
      * Writes the specified lines using the specified [destination], dividing them
      * by platform-specific line separator.
      *
-     * The written lines are also padded with platform's line separator from both sides
+     * The written lines are also padded with the platform's line separator from both sides.
      */
     internal fun writeBlocks(destination: StringWriter, vararg lines: String) {
         lines.iterator().forEach {

buildSrc/src/main/kotlin/io/spine/gradle/report/pom/PomXmlWriter.kt

@@ -55,7 +55,6 @@ internal constructor(
      */
     fun writeTo(file: File) {
         val out = StringWriter()
-
         writeStart(out)
         writeBlocks(
             out,
@@ -66,8 +65,9 @@ internal constructor(
         )
         PomFormatting.writeEnd(out)
 
-        fileWriter.write(out.toString())
-        fileWriter.close()
+        FileWriter(file).use {
+            it.write(out.toString())
+        }
     }
 
     /**