Fix .hgignore parsing if last line has no EOL, ignore trailing white space.

Fix .hgignore parsing if last line has no EOL, ignore trailing white space.
(and don't use tabs in python code)

--- a/mercurial/hg.py	Sun Aug 14 22:00:16 2005 -0800
+++ b/mercurial/hg.py	Mon Aug 15 08:08:11 2005 +0100
@@ -311,8 +311,8 @@
             try:
                 l = file(self.wjoin(".hgignore"))
                 for pat in l:
-                    if pat != "\n":
-			p = pat[:-1]
+                    p = pat.rstrip()
+                    if p:
                         try:
                             re.compile(p)
                         except: