Using a format string is very slightly slower than just adding all the bits of the string together.

2 files changed, 2 insertions, 2 deletions

diff --git a/bs4/element.py b/bs4/element.py
index 4f1372a..630fd96 100644
--- a/bs4/element.py
+++ b/bs4/element.py
@@ -1818,7 +1818,7 @@ class Tag(PageElement):
             void_element_closing_slash = formatter.void_element_close_prefix or ''
 
         # Put it all together.
-        return f'<{closing_slash}{prefix}{self.name}{attribute_string}{void_element_closing_slash}>'
+        return '<' + closing_slash + prefix + self.name + attribute_string + void_element_closing_slash + '>'
 
     def _should_pretty_print(self, indent_level=1):
         """Should this tag be pretty-printed?
diff --git a/bs4/formatter.py b/bs4/formatter.py
index 83cc1c5..c821318 100644
--- a/bs4/formatter.py
+++ b/bs4/formatter.py
@@ -97,7 +97,7 @@ class Formatter(EntitySubstitution):
         else:
             indent = ' '
         self.indent = indent
-        
+
     def substitute(self, ns):
         """Process a string that needs to undergo entity substitution.
         This may be a string encountered in an attribute value or as