diff --git a/Python/future.c b/Python/future.c
index 4178541..515dcd9 100644
--- a/Python/future.c
+++ b/Python/future.c
@@ -14,131 +14,131 @@
 static int
 future_check_features(PyFutureFeatures *ff, stmt_ty s, const char *filename)
 {
-	int i;
-	asdl_seq *names;
+    int i;
+    asdl_seq *names;
 
-	assert(s->kind == ImportFrom_kind);
+    assert(s->kind == ImportFrom_kind);
 
-	names = s->v.ImportFrom.names;
-	for (i = 0; i < asdl_seq_LEN(names); i++) {
-                alias_ty name = (alias_ty)asdl_seq_GET(names, i);
-		const char *feature = _PyUnicode_AsString(name->name);
-		if (!feature)
-			return 0;
-		if (strcmp(feature, FUTURE_NESTED_SCOPES) == 0) {
-			continue;
-		} else if (strcmp(feature, FUTURE_GENERATORS) == 0) {
-			continue;
-		} else if (strcmp(feature, FUTURE_DIVISION) == 0) {
-			continue;
-		} else if (strcmp(feature, FUTURE_ABSOLUTE_IMPORT) == 0) {
-			continue;
-		} else if (strcmp(feature, FUTURE_WITH_STATEMENT) == 0) {
-			continue;
-		} else if (strcmp(feature, FUTURE_PRINT_FUNCTION) == 0) {
-			continue;
-		} else if (strcmp(feature, FUTURE_UNICODE_LITERALS) == 0) {
-			continue;
-		} else if (strcmp(feature, FUTURE_BARRY_AS_BDFL) == 0) {
-			ff->ff_features |= CO_FUTURE_BARRY_AS_BDFL;
-		} else if (strcmp(feature, "braces") == 0) {
-			PyErr_SetString(PyExc_SyntaxError,
-					"not a chance");
-			PyErr_SyntaxLocation(filename, s->lineno);
-			return 0;
-		} else {
-			PyErr_Format(PyExc_SyntaxError,
-				     UNDEFINED_FUTURE_FEATURE, feature);
-			PyErr_SyntaxLocation(filename, s->lineno);
-			return 0;
-		}
-	}
-	return 1;
+    names = s->v.ImportFrom.names;
+    for (i = 0; i < asdl_seq_LEN(names); i++) {
+        alias_ty name = (alias_ty)asdl_seq_GET(names, i);
+        const char *feature = _PyUnicode_AsString(name->name);
+        if (!feature)
+            return 0;
+        if (strcmp(feature, FUTURE_NESTED_SCOPES) == 0) {
+            continue;
+        } else if (strcmp(feature, FUTURE_GENERATORS) == 0) {
+            continue;
+        } else if (strcmp(feature, FUTURE_DIVISION) == 0) {
+            continue;
+        } else if (strcmp(feature, FUTURE_ABSOLUTE_IMPORT) == 0) {
+            continue;
+        } else if (strcmp(feature, FUTURE_WITH_STATEMENT) == 0) {
+            continue;
+        } else if (strcmp(feature, FUTURE_PRINT_FUNCTION) == 0) {
+            continue;
+        } else if (strcmp(feature, FUTURE_UNICODE_LITERALS) == 0) {
+            continue;
+        } else if (strcmp(feature, FUTURE_BARRY_AS_BDFL) == 0) {
+            ff->ff_features |= CO_FUTURE_BARRY_AS_BDFL;
+        } else if (strcmp(feature, "braces") == 0) {
+            PyErr_SetString(PyExc_SyntaxError,
+                            "not a chance");
+            PyErr_SyntaxLocation(filename, s->lineno);
+            return 0;
+        } else {
+            PyErr_Format(PyExc_SyntaxError,
+                         UNDEFINED_FUTURE_FEATURE, feature);
+            PyErr_SyntaxLocation(filename, s->lineno);
+            return 0;
+        }
+    }
+    return 1;
 }
 
 static int
 future_parse(PyFutureFeatures *ff, mod_ty mod, const char *filename)
 {
-	int i, found_docstring = 0, done = 0, prev_line = 0;
+    int i, found_docstring = 0, done = 0, prev_line = 0;
 
-	static PyObject *future;
-	if (!future) {
-		future = PyUnicode_InternFromString("__future__");
-		if (!future)
-			return 0;
-	}
+    static PyObject *future;
+    if (!future) {
+        future = PyUnicode_InternFromString("__future__");
+        if (!future)
+            return 0;
+    }
 
-	if (!(mod->kind == Module_kind || mod->kind == Interactive_kind))
-		return 1;
+    if (!(mod->kind == Module_kind || mod->kind == Interactive_kind))
+        return 1;
 
-	/* A subsequent pass will detect future imports that don't
-	   appear at the beginning of the file.  There's one case,
-	   however, that is easier to handle here: A series of imports
-	   joined by semi-colons, where the first import is a future
-	   statement but some subsequent import has the future form
-	   but is preceded by a regular import.
-	*/
-	   
+    /* A subsequent pass will detect future imports that don't
+       appear at the beginning of the file.  There's one case,
+       however, that is easier to handle here: A series of imports
+       joined by semi-colons, where the first import is a future
+       statement but some subsequent import has the future form
+       but is preceded by a regular import.
+    */
 
-	for (i = 0; i < asdl_seq_LEN(mod->v.Module.body); i++) {
-		stmt_ty s = (stmt_ty)asdl_seq_GET(mod->v.Module.body, i);
 
-		if (done && s->lineno > prev_line)
-			return 1;
-		prev_line = s->lineno;
+    for (i = 0; i < asdl_seq_LEN(mod->v.Module.body); i++) {
+        stmt_ty s = (stmt_ty)asdl_seq_GET(mod->v.Module.body, i);
 
-		/* The tests below will return from this function unless it is
-		   still possible to find a future statement.  The only things
-		   that can precede a future statement are another future
-		   statement and a doc string.
-		*/
+        if (done && s->lineno > prev_line)
+            return 1;
+        prev_line = s->lineno;
 
-		if (s->kind == ImportFrom_kind) {
-			if (s->v.ImportFrom.module == future) {
-				if (done) {
-					PyErr_SetString(PyExc_SyntaxError,
-							ERR_LATE_FUTURE);
-					PyErr_SyntaxLocation(filename, 
-							     s->lineno);
-					return 0;
-				}
-				if (!future_check_features(ff, s, filename))
-					return 0;
-				ff->ff_lineno = s->lineno;
-			}
-			else
-				done = 1;
-		}
-		else if (s->kind == Expr_kind && !found_docstring) {
-			expr_ty e = s->v.Expr.value;
-			if (e->kind != Str_kind)
-				done = 1;
-			else
-				found_docstring = 1;
-		}
-		else
-			done = 1;
-	}
-	return 1;
+        /* The tests below will return from this function unless it is
+           still possible to find a future statement.  The only things
+           that can precede a future statement are another future
+           statement and a doc string.
+        */
+
+        if (s->kind == ImportFrom_kind) {
+            if (s->v.ImportFrom.module == future) {
+                if (done) {
+                    PyErr_SetString(PyExc_SyntaxError,
+                                    ERR_LATE_FUTURE);
+                    PyErr_SyntaxLocation(filename,
+                                         s->lineno);
+                    return 0;
+                }
+                if (!future_check_features(ff, s, filename))
+                    return 0;
+                ff->ff_lineno = s->lineno;
+            }
+            else
+                done = 1;
+        }
+        else if (s->kind == Expr_kind && !found_docstring) {
+            expr_ty e = s->v.Expr.value;
+            if (e->kind != Str_kind)
+                done = 1;
+            else
+                found_docstring = 1;
+        }
+        else
+            done = 1;
+    }
+    return 1;
 }
 
 
 PyFutureFeatures *
 PyFuture_FromAST(mod_ty mod, const char *filename)
 {
-	PyFutureFeatures *ff;
+    PyFutureFeatures *ff;
 
-	ff = (PyFutureFeatures *)PyObject_Malloc(sizeof(PyFutureFeatures));
-	if (ff == NULL) {
-		PyErr_NoMemory();
-		return NULL;
-	}
-	ff->ff_features = 0;
-	ff->ff_lineno = -1;
+    ff = (PyFutureFeatures *)PyObject_Malloc(sizeof(PyFutureFeatures));
+    if (ff == NULL) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+    ff->ff_features = 0;
+    ff->ff_lineno = -1;
 
-	if (!future_parse(ff, mod, filename)) {
-		PyObject_Free(ff);
-		return NULL;
-	}
-	return ff;
+    if (!future_parse(ff, mod, filename)) {
+        PyObject_Free(ff);
+        return NULL;
+    }
+    return ff;
 }