[Review] scripts/symbolize.py: try to resolve abort address to symbol…

…/section[+offset]

- Replace tab by spaces
- Initialize ret to '' rather than None

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>

scripts/symbolize.py

@@ -138,7 +138,7 @@ def resolve(self, addr):
         return ret
 
     def symbol_plus_offset(self, addr):
-        ret = None
+        ret = ''
         prevsize = 0
         reladdr = self.subtract_load_addr(addr)
         elf = self.get_elf(self._bin)
@@ -171,13 +171,11 @@ def symbol_plus_offset(self, addr):
                 break
             prevsize = size
             prevname = name
-        if ret is None:
-            ret = ''
         nm.terminate()
         return ret
 
     def section_plus_offset(self, addr):
-        ret = None
+        ret = ''
         reladdr = self.subtract_load_addr(addr)
         elf = self.get_elf(self._bin)
         cmd = self.arch_prefix('objdump')
@@ -192,7 +190,7 @@ def section_plus_offset(self, addr):
                 idx, name, size, vma, lma, offs, algn = line.split()
             except:
                 continue;
-	    ivma = int(vma, 16)
+            ivma = int(vma, 16)
             isize = int(size, 16)
             if ivma == iaddr:
                 ret = name
@@ -201,8 +199,6 @@ def section_plus_offset(self, addr):
                 offs = iaddr - ivma
                 ret = name + '+' + str(offs)
                 break
-        if ret is None:
-            ret = ''
         objdump.terminate()
         return ret