s version and System V is that
     this version treats any white space as a delimiter, so that spaces in
     pattern strings must be escaped.  For example,

           &gt;10     string  language impress        (imPRESS data)

     in an existing magic file would have to be changed to

           &gt;10     string  language\ impress       (imPRESS data)

     In addition, in this version, if a pattern string contains a backslash,
     it must be escaped.  For example

           0       string          \b