diff --git a/src/calibre/gui2/dialogs/template_dialog.py b/src/calibre/gui2/dialogs/template_dialog.py
index 7febcb68af..ab4c414c45 100644
--- a/src/calibre/gui2/dialogs/template_dialog.py
+++ b/src/calibre/gui2/dialogs/template_dialog.py
@@ -12,8 +12,6 @@ import sys
 import traceback
 from functools import partial
 
-from qt.webengine import QWebEngineView
-
 from qt.core import (
     QAbstractItemView,
     QApplication,
@@ -36,13 +34,13 @@ from qt.core import (
     Qt,
     QTableWidget,
     QTableWidgetItem,
-    QTextBrowser,
     QTextCharFormat,
     QTextOption,
     QToolButton,
     QVBoxLayout,
     pyqtSignal,
 )
+from qt.webengine import QWebEngineView
 
 from calibre import sanitize_file_name
 from calibre.constants import config_dir
diff --git a/src/calibre/utils/ffml_processor.py b/src/calibre/utils/ffml_processor.py
index abc16f3cc8..acd83ec898 100644
--- a/src/calibre/utils/ffml_processor.py
+++ b/src/calibre/utils/ffml_processor.py
@@ -6,8 +6,10 @@ __copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
 from enum import IntEnum
+
 from calibre import prepare_string_for_xml
 
+
 class NodeKinds(IntEnum):
     DOCUMENT    = -1
     CODE_TEXT   = -2
@@ -413,7 +415,7 @@ class FFMLProcessor:
         self.move_pos(len('``'))
         end = self.find('``')
         if end < 0:
-            self.error(f'Missing closing "``" for CODE_TEXT')
+            self.error('Missing closing "``" for CODE_TEXT')
         node = CodeText(self.text_to(end))
         self.move_pos(end + len('``'))
         return node
@@ -422,7 +424,7 @@ class FFMLProcessor:
         self.move_pos(1)
         end = self.find('`')
         if end < 0:
-            self.error(f'Missing closing "`" for italics')
+            self.error('Missing closing "`" for italics')
         node = ItalicTextNode(self.text_to(end))
         self.move_pos(end + 1)
         return node
@@ -431,7 +433,7 @@ class FFMLProcessor:
         self.move_pos(len(':guilabel:`'))
         end = self.find('`')
         if end < 0:
-            self.error(f'Missing ` (backquote) for :guilabel:')
+            self.error('Missing ` (backquote) for :guilabel:')
         node = GuiLabelNode(self.text_to_no_newline(end, 'GUI_LABEL (:guilabel:`)'))
         self.move_pos(end + len('`'))
         return node
@@ -440,7 +442,7 @@ class FFMLProcessor:
         self.move_pos(len('[CODE]\n'))
         end = self.find('[/CODE]')
         if end < 0:
-            self.error(f'Missing [/CODE] for block')
+            self.error('Missing [/CODE] for block')
         node = CodeBlock(self.text_to(end))
         self.move_pos(end + len('[/CODE]'))
         if self.text_to(1) == '\n':