diff --git a/teckids.sty b/teckids.sty
index aff7875f99f0887ce3e0c8b755813e33db9c0e81..4321f4a9b7d6df09c1447aebc970901265726ebb 100644
--- a/teckids.sty
+++ b/teckids.sty
@@ -1,7 +1,7 @@
 % Teckids e.V. - Allgemeine Vorlage
 %-
 % Copyright © 2013
-% Dominik George <nik@naturalnet.de>
+%	Dominik George <nik@naturalnet.de>
 %
 % Copyright © 2014, 2015
 %	Thorsten “mirabilos” Glaser <thorsten.glaser@teckids.org>
@@ -170,25 +170,25 @@
 \newcommand{\listingsinpython}{\definecolor{listinggray}{gray}{0.9}
 \definecolor{lbcolor}{rgb}{0.9,0.9,0.9}
 \lstset{
-        backgroundcolor=\color{lbcolor},
-        tabsize=4,
-        rulecolor=,
-        language=python,
-        basicstyle=\ttfamily,
-        upquote=true,
-        aboveskip={1.5\baselineskip},
-        columns=fixed,
-        showstringspaces=false,
-        extendedchars=true,
-        breaklines=true,
-        prebreak = \raisebox{0ex}[0ex][0ex]{\ensuremath{\hookleftarrow}},
-        frame=single,
-        showtabs=false,
-        showspaces=false,
-        showstringspaces=false,
-        keywordstyle=\color[rgb]{0,0,1},
-        commentstyle=\color[rgb]{0.133,0.545,0.133},
-        stringstyle=\color[rgb]{0.627,0.126,0.941},
+	backgroundcolor=\color{lbcolor},
+	tabsize=4,
+	rulecolor=,
+	language=python,
+	basicstyle=\ttfamily,
+	upquote=true,
+	aboveskip={1.5\baselineskip},
+	columns=fixed,
+	showstringspaces=false,
+	extendedchars=true,
+	breaklines=true,
+	prebreak = \raisebox{0ex}[0ex][0ex]{\ensuremath{\hookleftarrow}},
+	frame=single,
+	showtabs=false,
+	showspaces=false,
+	showstringspaces=false,
+	keywordstyle=\color[rgb]{0,0,1},
+	commentstyle=\color[rgb]{0.133,0.545,0.133},
+	stringstyle=\color[rgb]{0.627,0.126,0.941},
 	literate={0}{\0}1{0\ }{\0\ }2,
 }
 }
diff --git a/teckidspubmat.cls b/teckidspubmat.cls
index f3ccbb616adc4e92e36c6f1bf6103caae607ffe9..cbf93d98b0be1937bb8094b55966056f3989617c 100644
--- a/teckidspubmat.cls
+++ b/teckidspubmat.cls
@@ -1,9 +1,9 @@
 % Teckids e.V. - Dokumentklasse für Unterrichtsmaterial
 %-
 % Copyright © 2013, 2014
-%     Dominik George <nik@naturalnet.de>
+%	Dominik George <nik@naturalnet.de>
 % Copyright © 2014, 2015
-%     Thorsten Glaser <thorsten.glaser@teckids.org>
+%	Thorsten Glaser <thorsten.glaser@teckids.org>
 %
 % Provided that these terms and disclaimer and all copyright notices
 % are retained or reproduced in an accompanying document, permission