fix(graphviz): ensure all lines are left-justified

Author: deepyaman

ibis/expr/visualize.py

@@ -83,7 +83,7 @@ def get_label(node):
         else:
             label_fmt = '<<B>{}</B><BR ALIGN="LEFT" />:: {}>'
         label = label_fmt.format(escape(name), typename)
-    return label
+    return rf"{label}\l"
 
 
 DEFAULT_NODE_ATTRS = {"shape": "box", "fontname": "Deja Vu Sans Mono"}