contrib: fix typo

I forgot to fix it in flight, this commit will do fine.

contrib/dumprevlog

@@ -1,60 +1,60 b''
 #!/usr/bin/env python3
 # Dump revlogs as raw data stream
 # $ find .hg/store/ -name "*.i" | xargs dumprevlog > repo.dump
 
 from __future__ import absolute_import, print_function
 
 import sys
 from mercurial.node import hex
 from mercurial import (
     encoding,
     pycompat,
     revlog,
 )
 from mercurial.utils import procutil
 
 from mercurial.revlogutils import (
     constants as revlog_constants,
 )
 
 for fp in (sys.stdin, sys.stdout, sys.stderr):
     procutil.setbinary(fp)
 
 
 def binopen(path, mode=b'rb'):
     if b'b' not in mode:
         mode = mode + b'b'
     return open(path, pycompat.sysstr(mode))
 
 
 binopen.options = {}
 
 
 def printb(data, end=b'\n'):
     sys.stdout.flush()
     procutil.stdout.write(data + end)
 
 
 for f in sys.argv[1:]:
     localf = encoding.strtolocal(f)
     if not localf.endswith(b'.i'):
         print("file:", f, file=sys.stderr)
-        print("  invalida filename", file=sys.stderr)
+        print("  invalid filename", file=sys.stderr)
 
     r = revlog.revlog(
         binopen,
         target=(revlog_constants.KIND_OTHER, b'dump-revlog'),
         radix=localf[:-2],
     )
     print("file:", f)
     for i in r:
         n = r.node(i)
         p = r.parents(n)
         d = r.revision(n)
         printb(b"node: %s" % hex(n))
         printb(b"linkrev: %d" % r.linkrev(i))
         printb(b"parents: %s %s" % (hex(p[0]), hex(p[1])))
         printb(b"length: %d" % len(d))
         printb(b"-start-")
         printb(d)
         printb(b"-end-")