Make :follow-hint take a keystring.

doc/help/commands.asciidoc

@@ -788,7 +788,7 @@ How many steps to zoom out.
 |<<completion-item-prev,completion-item-prev>>|Select the previous completion item.
 |<<drop-selection,drop-selection>>|Drop selection and keep selection mode enabled.
 |<<enter-mode,enter-mode>>|Enter a key mode.
-|<<follow-hint,follow-hint>>|Follow the currently selected hint.
+|<<follow-hint,follow-hint>>|Follow a hint.
 |<<follow-selected,follow-selected>>|Follow the selected text.
 |<<leave-mode,leave-mode>>|Leave the mode we're currently in.
 |<<message-error,message-error>>|Show an error message in the statusbar.
@@ -877,7 +877,12 @@ Enter a key mode.
 
 [[follow-hint]]
 === follow-hint
-Follow the currently selected hint.
+Syntax: +:follow-hint ['keystring']+
+
+Follow a hint.
+
+==== positional arguments
+* +'keystring'+: The hint to follow.
 
 [[follow-selected]]
 === follow-selected

qutebrowser/browser/hints.py

@@ -947,11 +947,18 @@ class HintManager(QObject):
         handler()
 
     @cmdutils.register(instance='hintmanager', scope='tab', hide=True)
-    def follow_hint(self):
-        """Follow the currently selected hint."""
-        if not self._context.to_follow:
-            raise cmdexc.CommandError("No hint to follow")
-        self.fire(self._context.to_follow, force=True)
+    def follow_hint(self, keystring=None):
+        """Follow a hint.
+
+        Args:
+            keystring: The hint to follow, or None.
+        """
+        if keystring is None:
+            if self._context.to_follow is None:
+                raise cmdexc.CommandError("No hint to follow")
+            else:
+                keystring = self._context.to_follow
+        self.fire(keystring, force=True)
 
     @pyqtSlot('QSize')
     def on_contents_size_changed(self, _size):