diff --git a/Python/ast.c b/Python/ast.c
index 2a806af..b8cb565 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -58,19 +58,19 @@
     /* Check whether there are non-ASCII characters in the
        identifier; if so, normalize to NFKC. */
     for (; *u; u++) {
-	if (*u >= 128) {
-	    PyObject *m = PyImport_ImportModuleNoBlock("unicodedata");
-	    PyObject *id2;
-	    if (!m)
-		return NULL;
-	    id2 = PyObject_CallMethod(m, "normalize", "sO", "NFKC", id);
-	    Py_DECREF(m);
-	    if (!id2)
-		return NULL;
-	    Py_DECREF(id);
-	    id = id2;
-	    break;
-	}
+        if (*u >= 128) {
+            PyObject *m = PyImport_ImportModuleNoBlock("unicodedata");
+            PyObject *id2;
+            if (!m)
+                return NULL;
+            id2 = PyObject_CallMethod(m, "normalize", "sO", "NFKC", id);
+            Py_DECREF(m);
+            if (!id2)
+                return NULL;
+            Py_DECREF(id);
+            id = id2;
+            break;
+        }
     }
     PyUnicode_InternInPlace(&id);
     PyArena_AddPyObject(arena, id);
@@ -226,7 +226,7 @@
         c.c_encoding = STR(n);
         n = CHILD(n, 0);
     } else {
-	/* PEP 3120 */
+        /* PEP 3120 */
         c.c_encoding = "utf-8";
     }
     c.c_arena = arena;
@@ -424,7 +424,7 @@
             s = e->v.List.elts;
             break;
         case Tuple_kind:
-            if (asdl_seq_LEN(e->v.Tuple.elts) == 0) 
+            if (asdl_seq_LEN(e->v.Tuple.elts) == 0)
                 return ast_error(n, "can't assign to ()");
             e->v.Tuple.ctx = ctx;
             s = e->v.Tuple.elts;
@@ -471,8 +471,8 @@
             expr_name = "conditional expression";
             break;
         default:
-            PyErr_Format(PyExc_SystemError, 
-                         "unexpected expression in assignment %d (line %d)", 
+            PyErr_Format(PyExc_SystemError,
+                         "unexpected expression in assignment %d (line %d)",
                          e->kind, e->lineno);
             return 0;
     }
@@ -487,7 +487,7 @@
     }
 
     /* If the LHS is a list or tuple, we need to set the assignment
-       context for all the contained elements.  
+       context for all the contained elements.
     */
     if (s) {
         int i;
@@ -709,7 +709,7 @@
     }
     return i;
  error:
-    return -1;   
+    return -1;
 }
 
 /* Create AST for argument list. */
@@ -722,12 +722,12 @@
 
        parameters: '(' [typedargslist] ')'
        typedargslist: ((tfpdef ['=' test] ',')*
-           ('*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] 
+           ('*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef]
            | '**' tfpdef)
            | tfpdef ['=' test] (',' tfpdef ['=' test])* [','])
        tfpdef: NAME [':' test]
        varargslist: ((vfpdef ['=' test] ',')*
-           ('*' [vfpdef] (',' vfpdef ['=' test])*  [',' '**' vfpdef] 
+           ('*' [vfpdef] (',' vfpdef ['=' test])*  [',' '**' vfpdef]
            | '**' vfpdef)
            | vfpdef ['=' test] (',' vfpdef ['=' test])* [','])
        vfpdef: NAME
@@ -768,7 +768,7 @@
         if (TYPE(ch) == vfpdef || TYPE(ch) == tfpdef) nposargs++;
         if (TYPE(ch) == EQUAL) nposdefaults++;
     }
-    /* count the number of keyword only args & 
+    /* count the number of keyword only args &
        defaults for keyword only args */
     for ( ; i < NCH(n); ++i) {
         ch = CHILD(n, i);
@@ -782,11 +782,11 @@
                    asdl_seq_new(nkwonlyargs, c->c_arena) : NULL);
     if (!kwonlyargs && nkwonlyargs)
         goto error;
-    posdefaults = (nposdefaults ? 
+    posdefaults = (nposdefaults ?
                     asdl_seq_new(nposdefaults, c->c_arena) : NULL);
     if (!posdefaults && nposdefaults)
         goto error;
-    /* The length of kwonlyargs and kwdefaults are same 
+    /* The length of kwonlyargs and kwdefaults are same
        since we set NULL as default for keyword only argument w/o default
        - we have sequence data structure, but no dictionary */
     kwdefaults = (nkwonlyargs ?
@@ -823,7 +823,7 @@
                     found_default = 1;
                 }
                 else if (found_default) {
-                    ast_error(n, 
+                    ast_error(n,
                              "non-default argument follows default argument");
                     goto error;
                 }
@@ -835,7 +835,7 @@
                 break;
             case STAR:
                 if (i+1 >= NCH(n)) {
-                    ast_error(CHILD(n, i), 
+                    ast_error(CHILD(n, i),
                         "named arguments must follow bare *");
                     goto error;
                 }
@@ -932,15 +932,15 @@
     /* decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE */
     expr_ty d = NULL;
     expr_ty name_expr;
-    
+
     REQ(n, decorator);
     REQ(CHILD(n, 0), AT);
     REQ(RCHILD(n, -1), NEWLINE);
-    
+
     name_expr = ast_for_dotted_name(c, CHILD(n, 1));
     if (!name_expr)
         return NULL;
-        
+
     if (NCH(n) == 3) { /* No arguments */
         d = name_expr;
         name_expr = NULL;
@@ -968,12 +968,12 @@
     asdl_seq* decorator_seq;
     expr_ty d;
     int i;
-    
+
     REQ(n, decorators);
     decorator_seq = asdl_seq_new(NCH(n), c->c_arena);
     if (!decorator_seq)
         return NULL;
-        
+
     for (i = 0; i < NCH(n); i++) {
         d = ast_for_decorator(c, CHILD(n, i));
             if (!d)
@@ -1029,7 +1029,7 @@
       return NULL;
 
     assert(TYPE(CHILD(n, 1)) == funcdef ||
-	   TYPE(CHILD(n, 1)) == classdef);
+           TYPE(CHILD(n, 1)) == classdef);
 
     if (TYPE(CHILD(n, 1)) == funcdef) {
       thing = ast_for_funcdef(c, CHILD(n, 1), decorator_seq);
@@ -1077,7 +1077,7 @@
 static expr_ty
 ast_for_ifexpr(struct compiling *c, const node *n)
 {
-    /* test: or_test 'if' or_test 'else' test */ 
+    /* test: or_test 'if' or_test 'else' test */
     expr_ty expression, body, orelse;
 
     assert(NCH(n) == 5);
@@ -1174,9 +1174,9 @@
         asdl_seq *t;
         expr_ty expression;
         node *for_ch;
-        
+
         REQ(n, comp_for);
-        
+
         for_ch = CHILD(n, 1);
         t = ast_for_exprlist(c, for_ch, Store);
         if (!t)
@@ -1201,7 +1201,7 @@
         if (NCH(n) == 5) {
             int j, n_ifs;
             asdl_seq *ifs;
-            
+
             n = CHILD(n, 4);
             n_ifs = count_comp_ifs(c, n);
             if (n_ifs == -1)
@@ -1215,7 +1215,7 @@
                 REQ(n, comp_iter);
                 n = CHILD(n, 0);
                 REQ(n, comp_if);
-                
+
                 expression = ast_for_expr(c, CHILD(n, 1));
                 if (!expression)
                     return NULL;
@@ -1240,13 +1240,13 @@
        argument: [test '='] test [comp_for]       # Really [keyword '='] test */
     expr_ty elt;
     asdl_seq *comps;
-    
+
     assert(NCH(n) > 1);
-    
+
     elt = ast_for_expr(c, CHILD(n, 0));
     if (!elt)
         return NULL;
-    
+
     comps = ast_for_comprehension(c, CHILD(n, 1));
     if (!comps)
         return NULL;
@@ -1267,10 +1267,10 @@
 {
     expr_ty key, value;
     asdl_seq *comps;
-    
+
     assert(NCH(n) > 3);
     REQ(CHILD(n, 1), COLON);
-    
+
     key = ast_for_expr(c, CHILD(n, 0));
     if (!key)
         return NULL;
@@ -1278,11 +1278,11 @@
     value = ast_for_expr(c, CHILD(n, 2));
     if (!value)
         return NULL;
-    
+
     comps = ast_for_comprehension(c, CHILD(n, 3));
     if (!comps)
         return NULL;
-    
+
     return DictComp(key, value, comps, LINENO(n), n->n_col_offset, c->c_arena);
 }
 
@@ -1317,7 +1317,7 @@
     */
     node *ch = CHILD(n, 0);
     int bytesmode = 0;
-    
+
     switch (TYPE(ch)) {
     case NAME: {
         /* All names start in Load context, but may later be
@@ -1368,24 +1368,24 @@
         return Ellipsis(LINENO(n), n->n_col_offset, c->c_arena);
     case LPAR: /* some parenthesized expressions */
         ch = CHILD(n, 1);
-        
+
         if (TYPE(ch) == RPAR)
             return Tuple(NULL, Load, LINENO(n), n->n_col_offset, c->c_arena);
-        
+
         if (TYPE(ch) == yield_expr)
             return ast_for_expr(c, ch);
 
-        /* testlist_comp: test ( comp_for | (',' test)* [','] ) */ 
+        /* testlist_comp: test ( comp_for | (',' test)* [','] ) */
         if ((NCH(ch) > 1) && (TYPE(CHILD(ch, 1)) == comp_for))
             return ast_for_genexp(c, ch);
-        
+
         return ast_for_testlist(c, ch);
     case LSQB: /* list (or list comprehension) */
         ch = CHILD(n, 1);
-        
+
         if (TYPE(ch) == RSQB)
             return List(NULL, Load, LINENO(n), n->n_col_offset, c->c_arena);
-        
+
         REQ(ch, testlist_comp);
         if (NCH(ch) == 1 || TYPE(CHILD(ch, 1)) == COMMA) {
             asdl_seq *elts = seq_for_testlist(c, ch);
@@ -1432,14 +1432,14 @@
             keys = asdl_seq_new(size, c->c_arena);
             if (!keys)
                 return NULL;
-            
+
             values = asdl_seq_new(size, c->c_arena);
             if (!values)
                 return NULL;
-            
+
             for (i = 0; i < NCH(ch); i += 4) {
                 expr_ty expression;
-                
+
                 expression = ast_for_expr(c, CHILD(ch, i));
                 if (!expression)
                     return NULL;
@@ -1477,10 +1477,10 @@
     if (NCH(n) == 1 && TYPE(ch) == test) {
         /* 'step' variable hold no significance in terms of being used over
            other vars */
-        step = ast_for_expr(c, ch); 
+        step = ast_for_expr(c, ch);
         if (!step)
             return NULL;
-            
+
         return Index(step, c->c_arena);
     }
 
@@ -1537,7 +1537,7 @@
 ast_for_binop(struct compiling *c, const node *n)
 {
     /* Must account for a sequence of expressions.
-       How should A op B op C by represented?  
+       How should A op B op C by represented?
        BinOp(BinOp(A, op, B), op, C).
     */
 
@@ -1575,10 +1575,10 @@
         if (!tmp)
             return NULL;
 
-        tmp_result = BinOp(result, newoperator, tmp, 
+        tmp_result = BinOp(result, newoperator, tmp,
                            LINENO(next_oper), next_oper->n_col_offset,
                            c->c_arena);
-        if (!tmp_result) 
+        if (!tmp_result)
             return NULL;
         result = tmp_result;
     }
@@ -1588,7 +1588,7 @@
 static expr_ty
 ast_for_trailer(struct compiling *c, const node *n, expr_ty left_expr)
 {
-    /* trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME 
+    /* trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME
        subscriptlist: subscript (',' subscript)* [',']
        subscript: '.' '.' '.' | test | [test] ':' [test] [sliceop]
      */
@@ -1619,7 +1619,7 @@
                              c->c_arena);
         }
         else {
-            /* The grammar is ambiguous here. The ambiguity is resolved 
+            /* The grammar is ambiguous here. The ambiguity is resolved
                by treating the sequence as a tuple literal if there are
                no slice features.
             */
@@ -1772,7 +1772,7 @@
     /* handle the full range of simple expressions
        test: or_test ['if' or_test 'else' test] | lambdef
        test_nocond: or_test | lambdef_nocond
-       or_test: and_test ('or' and_test)* 
+       or_test: and_test ('or' and_test)*
        and_test: not_test ('and' not_test)*
        not_test: 'not' not_test | comparison
        comparison: expr (comp_op expr)*
@@ -1860,7 +1860,7 @@
                     if (!expression) {
                         return NULL;
                     }
-                        
+
                     asdl_seq_SET(ops, i / 2, newoperator);
                     asdl_seq_SET(cmps, i / 2, expression);
                 }
@@ -1868,7 +1868,7 @@
                 if (!expression) {
                     return NULL;
                 }
-                    
+
                 return Compare(expression, ops, cmps, LINENO(n),
                                n->n_col_offset, c->c_arena);
             }
@@ -1987,7 +1987,7 @@
                 if (!e)
                     return NULL;
                 asdl_seq_SET(args, nargs++, e);
-            }  
+            }
             else if (TYPE(CHILD(ch, 1)) == comp_for) {
                 e = ast_for_genexp(c, ch);
                 if (!e)
@@ -1999,7 +1999,7 @@
                 identifier key, tmp;
                 int k;
 
-                /* CHILD(ch, 0) is test, but must be an identifier? */ 
+                /* CHILD(ch, 0) is test, but must be an identifier? */
                 e = ast_for_expr(c, CHILD(ch, 0));
                 if (!e)
                     return NULL;
@@ -2015,8 +2015,8 @@
                   ast_error(CHILD(ch, 0), "keyword can't be an expression");
                   return NULL;
                 } else if (forbidden_name(e, ch)) {
-		  return NULL;
-		}
+                  return NULL;
+                }
                 key = e->v.Name.id;
                 for (k = 0; k < nkeywords; k++) {
                     tmp = ((keyword_ty)asdl_seq_GET(keywords, k))->arg;
@@ -2080,7 +2080,7 @@
 ast_for_expr_stmt(struct compiling *c, const node *n)
 {
     REQ(n, expr_stmt);
-    /* expr_stmt: testlist (augassign (yield_expr|testlist) 
+    /* expr_stmt: testlist (augassign (yield_expr|testlist)
                 | ('=' (yield_expr|testlist))*)
        testlist: test (',' test)* [',']
        augassign: '+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^='
@@ -2154,7 +2154,7 @@
             e = ast_for_testlist(c, ch);
 
             /* set context to assign */
-            if (!e) 
+            if (!e)
               return NULL;
 
             if (!set_context(c, e, Store, CHILD(n, i)))
@@ -2200,7 +2200,7 @@
 ast_for_del_stmt(struct compiling *c, const node *n)
 {
     asdl_seq *expr_list;
-    
+
     /* del_stmt: 'del' exprlist */
     REQ(n, del_stmt);
 
@@ -2323,7 +2323,7 @@
                 int i;
                 size_t len;
                 char *s;
-		PyObject *uni;
+                PyObject *uni;
 
                 len = 0;
                 for (i = 0; i < NCH(n); i += 2)
@@ -2344,13 +2344,13 @@
                 }
                 --s;
                 *s = '\0';
-		uni = PyUnicode_DecodeUTF8(PyBytes_AS_STRING(str),
-					   PyBytes_GET_SIZE(str), 
-					   NULL);
-		Py_DECREF(str);
-		if (!uni)
-		    return NULL;
-		str = uni;
+                uni = PyUnicode_DecodeUTF8(PyBytes_AS_STRING(str),
+                                           PyBytes_GET_SIZE(str),
+                                           NULL);
+                Py_DECREF(str);
+                if (!uni)
+                    return NULL;
+                str = uni;
                 PyUnicode_InternInPlace(&str);
                 PyArena_AddPyObject(c->c_arena, str);
                 return alias(str, NULL, c->c_arena);
@@ -2407,7 +2407,7 @@
         int idx, ndots = 0;
         alias_ty mod = NULL;
         identifier modname;
-        
+
        /* Count the number of dots (for relative imports) and check for the
           optional module name */
         for (idx = 1; idx < NCH(n); idx++) {
@@ -2416,7 +2416,7 @@
                 idx++;
                 break;
             } else if (TYPE(CHILD(n, idx)) == ELLIPSIS) {
-                /* three consecutive dots are tokenized as one ELLIPSIS */ 
+                /* three consecutive dots are tokenized as one ELLIPSIS */
                 ndots += 3;
                 continue;
             } else if (TYPE(CHILD(n, idx)) != DOT) {
@@ -2545,7 +2545,7 @@
         expr2 = ast_for_expr(c, CHILD(n, 3));
         if (!expr2)
             return NULL;
-            
+
         return Assert(expr1, expr2, LINENO(n), n->n_col_offset, c->c_arena);
     }
     PyErr_Format(PyExc_SystemError,
@@ -2572,7 +2572,7 @@
     if (TYPE(CHILD(n, 0)) == simple_stmt) {
         n = CHILD(n, 0);
         /* simple_stmt always ends with a NEWLINE,
-           and may have a trailing SEMI 
+           and may have a trailing SEMI
         */
         end = NCH(n) - 1;
         if (TYPE(CHILD(n, end - 1)) == SEMI)
@@ -2637,10 +2637,10 @@
         expression = ast_for_expr(c, CHILD(n, 1));
         if (!expression)
             return NULL;
-        suite_seq = ast_for_suite(c, CHILD(n, 3)); 
+        suite_seq = ast_for_suite(c, CHILD(n, 3));
         if (!suite_seq)
             return NULL;
-            
+
         return If(expression, suite_seq, NULL, LINENO(n), n->n_col_offset,
                   c->c_arena);
     }
@@ -2698,8 +2698,8 @@
             if (!suite_seq2)
                 return NULL;
 
-            asdl_seq_SET(orelse, 0, 
-                         If(expression, suite_seq, suite_seq2, 
+            asdl_seq_SET(orelse, 0,
+                         If(expression, suite_seq, suite_seq2,
                             LINENO(CHILD(n, NCH(n) - 6)),
                             CHILD(n, NCH(n) - 6)->n_col_offset,
                             c->c_arena));
@@ -2720,7 +2720,7 @@
                 return NULL;
 
             asdl_seq_SET(newobj, 0,
-                         If(expression, suite_seq, orelse, 
+                         If(expression, suite_seq, orelse,
                             LINENO(CHILD(n, off)),
                             CHILD(n, off)->n_col_offset, c->c_arena));
             orelse = newobj;
@@ -2914,7 +2914,7 @@
         ast_error(n, "malformed 'try' statement");
         return NULL;
     }
-    
+
     if (n_except > 0) {
         int i;
         stmt_ty except_st;
@@ -3125,8 +3125,8 @@
                 return ast_for_funcdef(c, ch, NULL);
             case classdef:
                 return ast_for_classdef(c, ch, NULL);
-	    case decorated:
-	        return ast_for_decorated(c, ch);
+            case decorated:
+                return ast_for_decorated(c, ch);
             default:
                 PyErr_Format(PyExc_SystemError,
                              "unhandled small_stmt: TYPE=%d NCH=%d\n",
@@ -3288,7 +3288,7 @@
         if (quote == 'b' || quote == 'B') {
             quote = *++s;
             *bytesmode = 1;
-        }             
+        }
         if (quote == 'r' || quote == 'R') {
             quote = *++s;
             rawmode = 1;
@@ -3301,7 +3301,7 @@
     s++;
     len = strlen(s);
     if (len > INT_MAX) {
-        PyErr_SetString(PyExc_OverflowError, 
+        PyErr_SetString(PyExc_OverflowError,
                         "string to parse is too long");
         return NULL;
     }
@@ -3345,7 +3345,7 @@
             return PyBytes_FromStringAndSize(s, len);
         } else if (strcmp(c->c_encoding, "utf-8") == 0) {
             return PyUnicode_FromStringAndSize(s, len);
-	} else {
+        } else {
             return PyUnicode_DecodeLatin1(s, len, NULL);
         }
     }