preserve_exclamation_comments documented in method docstrings

Author: wtayyeb

csscompressor/__init__.py

@@ -468,6 +468,12 @@ def compress(css, max_linelen=0, preserve_exclamation_comments=True):
  than, say 8000 characters, are checked in. This option is used in
  that case to split long lines after a specific column.
 
+ - preserve_exclamation_comments : boolean = True
+ Some stylesheets contain /*! ... */ comment block which used for copyright
+ notices or else. By default compress dont remove them like other comment
+ blocks. It will lead to bigger file size. but once you decide to remove
+ them just set this parameter to False.
+
  Returns a ``str`` object with compressed CSS.
  """
 
@@ -494,6 +500,10 @@ def compress_partitioned(css,
  a list of ``str`` objects, each limited to contain less than the passed number
  of rules.
 
+- preserve_exclamation_comments : boolean = True
+Has the same meaning as for "compress()" function.
+
+
  Always returns a ``list`` of ``str`` objects with compressed CSS.
  """