more fixes

Author: fchapoton

src/sage/combinat/crystals/generalized_young_walls.py

@@ -285,7 +285,7 @@ def generate_signature(self, i):
         strsig = ''.join( x[0] for x in sig)
         reducedsig = strsig
         while re.search(r"\+\s*-",reducedsig):
-            reducedsig = re.sub(r"\+\s*-", lambda match : str().ljust(len(match.group(int(0)))) , reducedsig)
+            reducedsig = re.sub(r"\+\s*-", lambda match : ''.ljust(len(match.group(0))) , reducedsig)
         return (sig,reducedsig)
 
     def signature(self, i):

src/sage/combinat/parallelogram_polyomino.py

@@ -3958,7 +3958,7 @@ def _latex_drawing(self):
             ...
             \end{tikzpicture}
         """
-        latex.add_package_to_preamble_if_available(str("tikz"))
+        latex.add_package_to_preamble_if_available("tikz")
         tikz_options = self.get_tikz_options()
         res = "\n\\begin{tikzpicture}[scale=%s]" % (tikz_options['scale'])
         res += self.to_tikz()

src/sage/combinat/root_system/weyl_characters.py

@@ -691,7 +691,7 @@ def _demazure_weights(self, hwv, word="long", debug=False):
         dd = {}
         h = tuple(int(hwv.inner_product(alphacheck[j]))
                   for j in self._space.index_set())
-        dd[h] = int(1)
+        dd[h] = 1
         return self._demazure_helper(dd, word=word, debug=debug)
 
     def _demazure_helper(self, dd, word="long", debug=False):