Add --mhtml flag to :download

And remove :download-whole command.

doc/help/commands.asciidoc

@@ -19,7 +19,6 @@
 |<<download-open,download-open>>|Open the last/[count]th download.
 |<<download-remove,download-remove>>|Remove the last/[count]th download from the list.
 |<<download-retry,download-retry>>|Retry the first failed/[count]th download.
-|<<download-whole,download-whole>>|Download the current page as a MHTML file, including all assets.
 |<<forward,forward>>|Go forward in the history of the current tab.
 |<<fullscreen,fullscreen>>|Toggle fullscreen mode.
 |<<help,help>>|Show help about a command or setting.
@@ -146,7 +145,7 @@ Close the current window.
 
 [[download]]
 === download
-Syntax: +:download [*--dest* 'DEST'] ['url'] ['dest-old']+
+Syntax: +:download [*--mhtml*] [*--dest* 'DEST'] ['url'] ['dest-old']+
 
 Download a given URL, or current page if no URL given.
 
@@ -157,6 +156,7 @@ The form `:download [url] [dest]` is deprecated, use `:download --dest [dest] [u
 * +'dest-old'+: (deprecated) Same as dest.
 
 ==== optional arguments
+* +*-m*+, +*--mhtml*+: Download the current page and all assets as mhtml file.
 * +*-d*+, +*--dest*+: The file path to write the download to, or not given to ask.
 
 [[download-cancel]]
@@ -203,15 +203,6 @@ Retry the first failed/[count]th download.
 ==== count
 The index of the download to cancel.
 
-[[download-whole]]
-=== download-whole
-Syntax: +:download-whole ['dest']+
-
-Download the current page as a MHTML file, including all assets.
-
-==== positional arguments
-* +'dest'+: The file path to write the download to.
-
 [[forward]]
 === forward
 Syntax: +:forward [*--tab*] [*--bg*] [*--window*]+

qutebrowser/browser/commands.py

@@ -1140,7 +1140,7 @@ class CommandDispatcher:
                 cur.inspector.show()
 
     @cmdutils.register(instance='command-dispatcher', scope='window')
-    def download(self, url=None, dest_old=None, *, dest=None):
+    def download(self, url=None, dest_old=None, *, mhtml=False, dest=None):
         """Download a given URL, or current page if no URL given.
 
         The form `:download [url] [dest]` is deprecated, use `:download --dest
@@ -1150,6 +1150,7 @@ class CommandDispatcher:
             url: The URL to download. If not given, download the current page.
             dest_old: (deprecated) Same as dest.
             dest: The file path to write the download to, or None to ask.
+            mhtml: Download the current page and all assets as mhtml file.
         """
         if dest_old is not None:
             message.warning('current', ":download [url] [dest] is deprecated -"
@@ -1162,15 +1163,20 @@ class CommandDispatcher:
         download_manager = objreg.get('download-manager', scope='window',
                                       window=self._win_id)
         if url:
+            if mhtml:
+                raise cmdexc.CommandError("Can only download the current page"
+                                          " as mhtml.")
             url = urlutils.qurl_from_user_input(url)
             urlutils.raise_cmdexc_if_invalid(url)
             download_manager.get(url, filename=dest)
+        else:
+            if mhtml:
+                self._download_mhtml(dest)
             else:
                 page = self._current_widget().page()
                 download_manager.get(self._current_url(), page=page, filename=dest)
 
-    @cmdutils.register(instance='command-dispatcher', scope='window')
+    def _download_mhtml(self, dest=None):
-    def download_whole(self, dest=None):
         """Download the current page as a MHTML file, including all assets.
 
         Args: