Modify the way ^ is rendering

mapytex/calculus/core/renders/tree2txt.py

@@ -176,17 +176,17 @@ def pow2txt(left, right):
 
     >>> from ..MO import mo
     >>> pow2txt(mo.MO(2), mo.MO(3))
-    '2 ^ 3'
+    '2^3'
     >>> from ..tree import Tree
     >>> t = Tree.from_str("1^2")
     >>> pow2txt(t, mo.MO(3))
-    '1 ^ 2 ^ 3'
+    '1^2^3'
     >>> t = Tree.from_str("1+2")
     >>> pow2txt(t, mo.MO(3))
-    '(1 + 2) ^ 3'
+    '(1 + 2)^3'
     >>> t = Tree.from_str("1*2")
     >>> pow2txt(mo.MO(3), t)
-    '3 ^ (1 * 2)'
+    '3^(1 * 2)'
     """
     try:
         left_need_parenthesis = False
@@ -211,7 +211,7 @@ def pow2txt(left, right):
         else:
             right_ = tree2txt(right)
 
-    return f"{left_} ^ {right_}"
+    return f"{left_}^{right_}"
 
 OPERATOR2TXT = {
     "+": plus2txt,