uncommit: drop the hyphen from --current-user and --current-date

I didn't pay enough attention to these long forms- graft, amend and MQ already
use the old style naming.  It's probably more important to be consistent than
modern.  The hypenated style came from evolve.

Yuya mentioned this naming discrepancy in 4145fd3569c3, but it didn't attract
any discussion[1].  There's also a bit of inconsistency in that the default
parameter for `currentdate` is `False` for graft, and `None` for the rest.

[1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2019-January/126767.html

Differential Revision: https://phab.mercurial-scm.org/D6841

mercurial/cmdutil.py

@@ -101,9 +101,9 b' commitopts2 = ['
 ]
 
 commitopts3 = [
-    (b'D', b'current-date', None,
+    (b'D', b'currentdate', None,
      _(b'record the current date as commit date')),
-    (b'U', b'current-user', None,
+    (b'U', b'currentuser', None,
      _(b'record the current user as committer')),
 ]
 
@@ -186,9 +186,9 b' def resolvecommitoptions(ui, opts):'
     """modify commit options dict to handle related options
     """
     # N.B. this is extremely similar to setupheaderopts() in mq.py
-    if not opts.get(b'date') and opts.get(b'current_date'):
+    if not opts.get(b'date') and opts.get(b'currentdate'):
         opts[b'date'] = b'%d %d' % dateutil.makedate()
-    if not opts.get(b'user') and opts.get(b'current_user'):
+    if not opts.get(b'user') and opts.get(b'currentuser'):
         opts[b'user'] = ui.username()
 
 def ishunk(x):

tests/test-uncommit.t

@@ -42,8 +42,8 b' Help for uncommit'
    -l --logfile FILE             read commit message from file
    -d --date DATE                record the specified date as commit date
    -u --user USER                record the specified user as committer
-   -D --current-date             record the current date as commit date
-   -U --current-user             record the current user as committer
+   -D --currentdate              record the current date as commit date
+   -U --currentuser              record the current user as committer
   
   (some details hidden, use --verbose to show complete help)