replace string module calls by string methods

lib/python/Interface/pprint.py

-import string
 
 """ Pretty-Print an Interface object as structured text (Yum) """
 
+import string
 
 def trim_doc_string(text):
     """
     Trims a doc string to make it format
     correctly with structured text.
     """
-    text=string.strip(text)
-    text=string.replace(text, '\r\n', '\n')
-    lines=string.split(text, '\n')
+    text=text.strip()
+    text=text.replace('\r\n', '\n')
+    lines=text.split('\n')
     nlines=[lines[0]]
     if len(lines) > 1:
         min_indent=None
         for line in lines[1:]:
-            indent=len(line) - len(string.lstrip(line))
+            indent=len(line) - len(line.lstrip())
             if indent < min_indent or min_indent is None:
                 min_indent=indent   
         for line in lines[1:]:
             nlines.append(line[min_indent:])
-    return string.join(nlines, '\n')
+    return '\n'.join(nlines, '\n')
     
     
     
@@ -31,25 +31,25 @@ def justify_and_indent(text, level, munge=0, width=72):
 
     if munge:
         line = " " * level
-        text = string.split(string.strip(string.translate(text, string.maketrans("\r\n", "  "))))
+        text = (string.translate(text, string.maketrans("\r\n", "  "))).strip.split()
 
         for word in text:
-            line = string.join([line, word])
+            line = ''.join([line, word])
             if len(line) > width:
                 lines.append(line)
                 line = " " * level
         else:
             lines.append(line)
 
-        return string.join(lines, "\n")
+        return '\n'.join(lines)
 
     else:
-        text = string.split(string.replace(text,"\r\n", "\n"), "\n")
+        text = text.replace("\r\n", "\n").split( "\n")
 
         for line in text:
             lines.append( (" " * level) + line)
 
-        return string.join(lines, "\n")
+        return '\n'.join(lines)
             
 
 def interface_as_stx(I, munge=0):