Document no_replace_variables, misc fixes

Add no_replace_variables to the asciidoc, improve its description in
the decorator, remove now unnecessary argument parsing in set-cmd-text

doc/help/commands.asciidoc

@@ -111,6 +111,7 @@ Bind a key to a command.
 ==== note
 * This command does not split arguments after the last argument and handles quotes literally.
 * With this command, +;;+ is interpreted literally instead of splitting off a second command.
+* This command does not replace variables like +\{url\}+.
 
 [[bookmark-add]]
 === bookmark-add
@@ -412,6 +413,7 @@ Execute a command after some time.
 ==== note
 * This command does not split arguments after the last argument and handles quotes literally.
 * With this command, +;;+ is interpreted literally instead of splitting off a second command.
+* This command does not replace variables like +\{url\}+.
 
 [[messages]]
 === messages
@@ -579,6 +581,7 @@ Repeat a given command.
 ==== note
 * This command does not split arguments after the last argument and handles quotes literally.
 * With this command, +;;+ is interpreted literally instead of splitting off a second command.
+* This command does not replace variables like +\{url\}+.
 
 [[report]]
 === report
@@ -714,6 +717,7 @@ Note the `{url}` and `{url:pretty}` variables might be useful here. `{url}` gets
 
 ==== note
 * This command does not split arguments after the last argument and handles quotes literally.
+* This command does not replace variables like +\{url\}+.
 
 [[stop]]
 === stop

qutebrowser/commands/command.py

@@ -82,7 +82,7 @@ class Command:
         no_cmd_split: If true, ';;' to split sub-commands is ignored.
         backend: Which backend the command works with (or None if it works with
                  both)
-        no_replace_variables: Whether or not to replace variables like {url}
+        no_replace_variables: Don't replace variables like {url}
         _qute_args: The saved data from @cmdutils.argument
         _needs_js: Whether the command needs javascript enabled
         _modes: The modes the command can be executed in.

qutebrowser/mainwindow/statusbar/command.py

@@ -108,9 +108,6 @@ class Command(misc.MinimalLineEditMixin, misc.CommandLineEdit):
             space: If given, a space is added to the end.
             append: If given, the text is appended to the current text.
         """
-        args = split.simple_split(text)
-        text = ' '.join(args)
-
         if space:
             text += ' '
         if append:

scripts/dev/src2asciidoc.py

@@ -239,7 +239,7 @@ def _get_command_doc_notes(cmd):
     Yield:
         Strings which should be added to the docs.
     """
-    if cmd.maxsplit is not None or cmd.no_cmd_split:
+    if cmd.maxsplit is not None or cmd.no_cmd_split or cmd.no_replace_variables:
         yield ""
         yield "==== note"
         if cmd.maxsplit is not None:
@@ -248,6 +248,8 @@ def _get_command_doc_notes(cmd):
         if cmd.no_cmd_split:
             yield ("* With this command, +;;+ is interpreted literally "
                    "instead of splitting off a second command.")
+        if cmd.no_replace_variables:
+            yield "* This command does not replace variables like +\{url\}+."
 
 
 def _get_action_metavar(action, nargs=1):