fancyopts: Copy list arguments in command table before modifying.

Before this, executing
commands.dispatch(['log', '-r', '0'])
commands.dispatch(['log', '-r', 'tip'])
would look like:
hg log -r 0
hg log -r 0 -r tip

Reported by TK Soh, patch by Alexis S. L. Carvalho

mercurial/fancyopts.py

@@ -1,32 +1,35 b''
 import getopt
 
 def fancyopts(args, options, state):
     long = []
     short = ''
     map = {}
     dt = {}
 
     for s, l, d, c in options:
         pl = l.replace('-', '_')
         map['-'+s] = map['--'+l] = pl
-        state[pl] = d
+        if isinstance(d, list):
+            state[pl] = d[:]
+        else:
+            state[pl] = d
         dt[pl] = type(d)
         if (d is not None and d is not True and d is not False and
             not callable(d)):
             if s: s += ':'
             if l: l += '='
         if s: short = short + s
         if l: long.append(l)
 
     opts, args = getopt.getopt(args, short, long)
 
     for opt, arg in opts:
         if dt[map[opt]] is type(fancyopts): state[map[opt]](state, map[opt], arg)
         elif dt[map[opt]] is type(1): state[map[opt]] = int(arg)
         elif dt[map[opt]] is type(''): state[map[opt]] = arg
         elif dt[map[opt]] is type([]): state[map[opt]].append(arg)
         elif dt[map[opt]] is type(None): state[map[opt]] = True
         elif dt[map[opt]] is type(False): state[map[opt]] = True
 
     return args