Hello:
    Recently in my work, I needed to change all the ‘\n’ to ‘\nSomeWords’. I 
wrote the build file as following:
<project name="xxx-test" basedir="." default="test1">
  
  <target name="test1">
    
    <copy file="originalForReplaced.txt" tofile="forReplaced.txt" 
overwrite="true">
    </copy>
    <replace file="forReplaced.txt" value="&#10;SomeWords" >
      <replacetoken>&#10;</replacetoken>
    </replace>
  </target>

</project>

originalForReplaced.txt

hello
world

note:between the hello and world is '\n' not '\r\n'

	But failed. I looked into the source code, discovered that the string 
to be replaced and to be replaced with have all been processed so that ‘\n’ are 
replaced with ‘\r\n’. but the string contains the whole text is not processed. 
So if the lines of the text are terminated with ‘\n’, all the line breaks will 
not be replaced. Then I added the code of:

	newString = stringReplace(newString, "\r\n","\n", false);
        newString = stringReplace(newString, "\n", StringUtils.LINE_SEP, false);

in org.apache.tools.ant.taskdefs.Replace.processFile
the problem is resolved.