diff --git a/doc/Makefile b/doc/Makefile
index f4f74d488..343cf7f55 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -30,7 +30,7 @@ SCRIPTS_DIR=scripts
 #
 XMLTO_DEBUG_FLAGS=
 ifneq ($(DEBUG),)
-    XMLTO_DEBUG_FLAGS=--noclean -p '--debug'
+	XMLTO_DEBUG_FLAGS=--noclean -p '--debug'
 endif
 
 all: $(OUTPUTS)
diff --git a/doc/scripts/fetch-images.xslt b/doc/scripts/fetch-images.xslt
index 86a6b88d8..451c830b8 100644
--- a/doc/scripts/fetch-images.xslt
+++ b/doc/scripts/fetch-images.xslt
@@ -41,9 +41,9 @@
   <!-- Output just the filename from a URL -->
   <xsl:template match="@fileref[parent::imagedata]">
     <xsl:attribute name="fileref">
-        <xsl:call-template name="filename">
-          <xsl:with-param name="path" select="."/>
-        </xsl:call-template>
+      <xsl:call-template name="filename">
+        <xsl:with-param name="path" select="."/>
+      </xsl:call-template>
     </xsl:attribute>
   </xsl:template>
 
diff --git a/doc/scripts/post-processor b/doc/scripts/post-processor
index fba619fc2..942253ba6 100755
--- a/doc/scripts/post-processor
+++ b/doc/scripts/post-processor
@@ -44,7 +44,7 @@ def subcommand_fix_wiki_urls(arguments):
     with open(file_name, 'r') as xml_file:
         lines = xml_file.readlines()
 
-    pattern = 'FreedomBox/Manual/{0}/FreedomBox'.format(page_name)
+    pattern = f'FreedomBox/Manual/{page_name}/FreedomBox'
     lines = list(map(lambda s: s.replace(pattern, 'FreedomBox'), lines))
 
     with open(file_name, 'w') as xml_file: