remove f-string for python < 3.6 compability

CHANGES.rst

@@ -1,7 +1,9 @@
-0.15.0 (2021-12-20)
+0.15.1 (2021-12-20)
 -------------------
 - Multi-rendering with same DocxTemplate object is now possible
   see tests/multi_rendering.py
+- fix #392
+- fix #398
 
 0.14.1 (2021-10-01)
 -------------------

docs/index.rst

@@ -110,6 +110,15 @@ But use this instead in your docx template ::
 This syntax is possible because MS Word considers each line as a new paragraph and
 ``{%p`` tags are not in the same paragraph in the second case.
 
+Multiple rendering
+..................
+
+Since v0.15.0, it is possible to create ``DocxTemplate`` object once and call
+``render(context)`` several times. Note that if you want to use replacement
+methods like ``replace_media()``, ``replace_embedded()`` and/or ``replace_zipname()``
+during multiple rendering, you will have to call ``reset_replacements()``
+at rendering loop start.
+
 Split and merge text
 ....................
 

docxtpl/__init__.py

@@ -4,7 +4,7 @@ Created : 2015-03-12
 
 @author: Eric Lapouyade
 """
-__version__ = '0.15.0'
+__version__ = '0.15.1'
 
 # flake8: noqa
 from .inline_image import InlineImage

tests/multi_rendering.py

@@ -37,4 +37,4 @@ for document_data in documents_data:
     dest_file = document_data['dest_file']
     context = document_data['context']
     tpl.render(context)
-    tpl.save(f'output/{dest_file}')
+    tpl.save('output/%s' % dest_file)