mercurial.el: fix error on hg-read-rev() with small tip, and cleanups...
mercurial.el: fix error on hg-read-rev() with small tip, and cleanups
* Fix error if tip revision is smaller than hg-rev-completion-limit
If tip revision is 10, "hg log -r -100:tip" fails.
* Remove dependencies on cl package at runtime
Quote from GNU Emacs Lisp Reference Manual, Emacs Lisp Coding Conventions:
> * Please don't require the `cl' package of Common Lisp extensions at
> run time. Use of this package is optional, and it is not part of
> the standard Emacs namespace. If your package loads `cl' at run
> time, that could cause name clashes for users who don't use that
> package.
* Check XEmacs at compile time
Since byte-compiled file is not portable between GNU Emacs and
XEmacs, checking type of emacs can be done at compile time. This
reduces byte-compiler warnings.
* Defvar variables binded dynamically and used across functions
* Combine status output string to state symbol alist into a variable,
and use char instead of string for key of state alist
* Make hg-view-mode as minor-mode
* Define keymaps as conventions
