diff --git a/niceplots/styles/doumont-light.mplstyle b/niceplots/styles/doumont-light.mplstyle
index 34daa08..0c06757 100644
--- a/niceplots/styles/doumont-light.mplstyle
+++ b/niceplots/styles/doumont-light.mplstyle
@@ -1,50 +1,50 @@
 # Figure settings
-savefig.dpi : 600
-figure.constrained_layout.use : True
+savefig.dpi: 600
+figure.constrained_layout.use: True
 
 
 # Axes settings
-axes.spines.top : False
-axes.spines.right : False
-axes.labelpad : 8.0
-axes.xmargin : 0
-axes.ymargin : 0
+axes.spines.top: False
+axes.spines.right: False
+axes.labelpad: 8.0
+axes.xmargin: 0
+axes.ymargin: 0
 
 
 # Font settings
-font.family : sans-serif
-font.sans-serif : CMU Bright
-axes.unicode_minus : False
-font.size : 18
+font.family: sans-serif
+font.sans-serif: CMU Bright
+axes.unicode_minus: False
+font.size: 18
 
-axes.labelweight : bold
+axes.labelweight: bold
 
-xtick.labelsize : small
-ytick.labelsize : small
+xtick.labelsize: small
+ytick.labelsize: small
 
-text.latex.preamble : r"\usepackage{cmbright}"
+text.latex.preamble: r"\usepackage{cmbright}"
 mathtext.default: regular
-pgf.rcfonts : True
+pgf.rcfonts: True
 
 
 # Legend settings
-legend.columnspacing : 0.2
-legend.frameon : False
+legend.columnspacing: 1.0
+legend.frameon: False
 
 
 # Line settings
-lines.linewidth : 2.0
-lines.markeredgewidth : 1.0
+lines.linewidth: 2.0
+lines.markeredgewidth: 1.0
 
 # Color settings
-axes.prop_cycle : cycler('color', ['e29400ff', '1E90FF', 'E21A1A', '00a650ff', '800000ff', 'ff8f00', '800080ff', '00A6D6', '000000ff'])
+axes.prop_cycle: cycler('color', ['e29400ff', '1E90FF', 'E21A1A', '00a650ff', '800000ff', 'ff8f00', '800080ff', '00A6D6', '000000ff'])
 
 # Use this parameter, which (hopefully) nobody will ever use, to store text the names of the colors in the color cycle
-keymap.help : Yellow, Blue, Red, Green, Maroon, Orange, Purple, Cyan, Black
-
-lines.markeredgecolor : w
-axes.edgecolor : 5a5758ff
-text.color : 5a5758ff
-axes.labelcolor : 5a5758ff
-xtick.color : 5a5758ff
-ytick.color : 5a5758ff
+keymap.help: Yellow, Blue, Red, Green, Maroon, Orange, Purple, Cyan, Black
+
+lines.markeredgecolor: w
+axes.edgecolor: 5a5758ff
+text.color: 5a5758ff
+axes.labelcolor: 5a5758ff
+xtick.color: 5a5758ff
+ytick.color: 5a5758ff
diff --git a/niceplots/utils.py b/niceplots/utils.py
index 7794675..86b0ba5 100644
--- a/niceplots/utils.py
+++ b/niceplots/utils.py
@@ -10,7 +10,6 @@
 import warnings
 import os
 import copy
-from collections.abc import Iterable
 from collections import OrderedDict
 
 # ==============================================================================
@@ -1036,7 +1035,7 @@ def save_figs(fig, name, formats, format_kwargs=None, **kwargs):
     fileName = os.path.splitext(name)[0]
 
     # --- Convert the file format to a list if only one given ---
-    if not isinstance(formats, Iterable):
+    if isinstance(formats, str):
         formats = [formats]
 
     # --- Save the figures ---