Update pow.md

Corrected the description, and content of the pow function, as well as updated with a better code, also fixed the line length issue and indentation issue in pow.md

Author: gspagare

docs/builtin/pow.md

@@ -12,11 +12,10 @@ Python pow() built-in function
     From the <a target="_blank" href="https://docs.python.org/3/library/functions.html#pow">Python 3 documentation</a>
   </base-disclaimer-title>
   <base-disclaimer-content>
-    The pow() function returns the power of a number.It takes two or three arguments:
-    pow(base, exp): Returns base raised to the power of exp (base ** exp).
-    pow(base, exp, mod): Returns (base ** exp) % mod (for modular arithmetic).
-    If the optional mod argument is present, the result is computed more 
-    efficiently than base ** exp % mod.
+      The pow() function returns the power of a number.It takes two or three arguments:
+      pow(base, exp): Returns base raised to the power of exp (base ** exp).
+      pow(base, exp, mod): Returns (base ** exp) % mod (for modular arithmetic).
+      Result is computed more efficiently than base ** exp % mod, if mod arg is present.
   </base-disclaimer-content>
 </base-disclaimer>