Invoke static methods as static methods.

Submitted by:	Kevin Jackson


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277022 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Concat.java

@@ -728,7 +728,7 @@ public class Concat extends Task {
                         new InputStreamReader(new FileInputStream(file),
                                               this.encoding));
                 }
-                value = fileUtils.readFully(reader);
+                value = FileUtils.readFully(reader);
             } catch (IOException ex) {
                 throw new BuildException(ex);
             } finally {