popTemporaryFile: Drops a temporary suffix from the temporary pathname
Description
  Drops a temporary suffix from the temporary pathname and, by default, renames an existing temporary file
  accordingly.
 Usage
"popTemporaryFile"(filename, path=NULL, suffix=".tmp", isFile=TRUE, ..., verbose=FALSE)
Arguments
filename
The filename of the temporary file.
path
The path of the temporary file.
suffix
The suffix of the temporary filename to be dropped.
isFile
If TRUE, the temporary file must exist and
      will be renamed.  If FALSE, it is only the pathname string
      that will be modified. For details, see below. Value
   Returns the pathname with the temporary suffix dropped.
 
Details
   If isFile is FALSE, the pathname where the suffix of the
   temporary pathname has been dropped is returned.
   If isFile is TRUE, the temporary file is renamed.
   Then, if the temporary file does not exists or it was not successfully
   renamed, an exception is thrown.