Disallow short earlygetop option combined with other short options

While "hg commit -qRfoo" can be read as "--quiet --repository foo",
"hg commit -mRfoo" should be "--message Rfoo".

mercurial/cmdutil.py

@@ -263,22 +263,16 b' def earlygetopt(aliases, args):'
     while pos < argcount:
         valuepos = argcount
         for opt in aliases:
-            # short option can have no spaces, e.g. hg log -qRfoo:
+            # short option can have no following space, e.g. hg log -Rfoo:
             if len(opt) == 2:
                 i = argcount
                 while i > 0:
                     i -= 1
                     arg = args[i]
-                    if len(arg) > 2 and arg[0] == '-' and arg[1] != '-':
-                        optpos = arg.find(opt[1])
-                        # split Rfoo -> R foo
-                        if 0 < optpos < len(arg)-1:
-                            args[i:i+1] = [arg[:optpos+1], arg[optpos+1:]]
-                            argcount += 1
-                        # split -qR -> -q -R
-                        if optpos > 1:
-                            args[i:i+1] = [arg[:optpos], opt]
-                            argcount += 1
+                    if len(arg) > 2 and arg.startswith(opt):
+                        # split -Rfoo -> -R foo
+                        args[i:i+1] = [opt, arg[2:]]
+                        argcount += 1
             # find next occurance of current alias
             try:
                 candidate = args.index(opt, pos, argcount) + 1

tests/test-globalopts

@@ -32,10 +32,8 b' echo "%% earlygetopt with duplicate opti'
 hg --cwd a --cwd b --cwd c tip
 hg --repo c --repository b -R a tip
 
-echo "%% earlygetopt short option without spaces (79cc512a34ed)"
-hg -qR a tip
+echo "%% earlygetopt short option without following space"
 hg -q -Rb tip
-hg -qRc tip
 
 echo %% --cwd
 hg --cwd a parents

tests/test-globalopts.out

@@ -46,10 +46,8 b' user: test'
 date:        Thu Jan 01 00:00:01 1970 +0000
 summary:     a
 
-%% earlygetopt short option without spaces (79cc512a34ed)
-0:8580ff50825a
+%% earlygetopt short option without following space
 0:b6c483daf290
-1:b6c483daf290
 %% --cwd
 changeset:   0:8580ff50825a
 tag:         tip