Fixes #179. Match any "scale(w h)" and replace with scale parameter f…

…or both.

Version to 1.3.5 quick fix

dtreeviz/utils.py

@@ -1,3 +1,4 @@
+import re
 import xml.etree.cElementTree as ET
 import pandas as pd
 from numbers import Number
@@ -109,7 +110,9 @@ def scale_SVG(svg:str, scale:float) -> str:
     ns = {"svg": "http://www.w3.org/2000/svg"}
     graph = root.find(".//svg:g", ns) # get first node, which is graph
     transform = graph.attrib['transform']
-    transform = transform.replace('scale(1 1)', f'scale({scale} {scale})')
+    pattern = re.compile(f"scale\([0-9.]+\ [0-9.]+\)")
+    scale_str = pattern.search(transform).group()
+    transform = transform.replace(scale_str, f'scale({scale} {scale})')
     graph.set("transform", transform)
 
     ET.register_namespace('', "http://www.w3.org/2000/svg")

setup.py

@@ -4,7 +4,7 @@
 
 setup(
     name='dtreeviz',
-    version='1.3.4',
+    version='1.3.5',
     url='https://github.com/parrt/dtreeviz',
     license='MIT',
     packages=find_packages(),