removed debug function

message body is placed in <pre></pre> instead of <code></code> in order to
display tabs in headers. rtrim function is used instead of trim in order to
strip writespace only from the end of line.

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@11075 7612ce4b-ef26-0410-bec9-ea0150e637f0