Fix lint

doc/help/settings.asciidoc

@@ -148,7 +148,7 @@
 |<<storage-offline-storage-database,offline-storage-database>>|Whether support for the HTML 5 offline storage feature is enabled.
 |<<storage-offline-web-application-storage,offline-web-application-storage>>|Whether support for the HTML 5 web application cache feature is enabled.
 |<<storage-local-storage,local-storage>>|Whether support for the HTML 5 local storage feature is enabled.
-|<<storage-cache-size,cache-size>>|Size of the HTTP network cache.
+|<<storage-cache-size,cache-size>>|Size of the HTTP network cache. Empty to use the default value.
 |==============
 
 .Quick reference for section ``content''
@@ -1383,9 +1383,9 @@ Default: +pass:[true]+
 
 [[storage-cache-size]]
 === cache-size
-Size of the HTTP network cache.
+Size of the HTTP network cache. Empty to use the default value.
 
-Default: +pass:[52428800]+
+Default: empty
 
 == content
 Loaded plugins/scripts and allowed actions.

qutebrowser/browser/commands.py

@@ -351,11 +351,11 @@ class CommandDispatcher:
 
     def _print_preview(self, tab):
         """Show a print preview."""
-        tab.printing.check_preview_support()
         def print_callback(ok):
             if not ok:
                 message.error("Printing failed!")
 
+        tab.printing.check_preview_support()
         diag = QPrintPreviewDialog()
         diag.setAttribute(Qt.WA_DeleteOnClose)
         diag.setWindowFlags(diag.windowFlags() | Qt.WindowMaximizeButtonHint |
@@ -365,8 +365,8 @@ class CommandDispatcher:
         diag.exec_()
 
     def _print_pdf(self, tab, filename):
-        tab.printing.check_pdf_support()
         """Print to the given PDF file."""
+        tab.printing.check_pdf_support()
         filename = os.path.expanduser(filename)
         directory = os.path.dirname(filename)
         if directory and not os.path.exists(directory):

qutebrowser/config/configdata.py

@@ -797,7 +797,8 @@ def data(readonly=False):
             ('cache-size',
              SettingValue(typ.Int(none_ok=True, minval=0,
                                   maxval=MAXVALS['int64']), ''),
-             "Size of the HTTP network cache. Empty to use the default value."),
+             "Size of the HTTP network cache. Empty to use the default "
+             "value."),
 
             readonly=readonly
         )),