Upgrade to 3.5.2

Author: asottile

libsass

@@ -1128,11 +1128,9 @@ def test_raises(self):
                 r'^Error: error in C function raises: \n'
                 r'       Traceback \(most recent call last\):\n'
                 r'.+'
-                r'AssertionError: foo\n\n\n'
-                r'       Backtrace:\n'
-                r'       \tstdin:1, in function `raises`\n'
-                r'       \tstdin:1\n'
-                r'        on line 1 of stdin\n'
+                r'AssertionError: foo\n'
+                r'        on line 1 of stdin, in function `raises`\n'
+                r'        from line 1 of stdin\n'
                 r'>> a { content: raises\(\); }\n'
                 r'   -------------\^\n$'
         )):
@@ -1141,11 +1139,9 @@ def test_raises(self):
     def test_warning(self):
         with assert_raises_compile_error(
                 'Error: warning in C function returns_warning: '
-                'This is a warning\n\n'
-                '       Backtrace:\n'
-                '       \tstdin:1, in function `returns_warning`\n'
-                '       \tstdin:1\n'
-                '        on line 1 of stdin\n'
+                'This is a warning\n'
+                '        on line 1 of stdin, in function `returns_warning`\n'
+                '        from line 1 of stdin\n'
                 '>> a { content: returns_warning(); }\n'
                 '   -------------^\n'
         ):
@@ -1154,11 +1150,9 @@ def test_warning(self):
     def test_error(self):
         with assert_raises_compile_error(
                 'Error: error in C function returns_error: '
-                'This is an error\n\n'
-                '       Backtrace:\n'
-                '       \tstdin:1, in function `returns_error`\n'
-                '       \tstdin:1\n'
-                '        on line 1 of stdin\n'
+                'This is an error\n'
+                '        on line 1 of stdin, in function `returns_error`\n'
+                '        from line 1 of stdin\n'
                 '>> a { content: returns_error(); }\n'
                 '   -------------^\n'
         ):
@@ -1178,11 +1172,9 @@ def test_returns_unknown_object(self):
                 '       - dict\n'
                 '       - SassMap\n'
                 '       - SassWarning\n'
-                '       - SassError\n\n\n'
-                '       Backtrace:\n'
-                '       \tstdin:1, in function `returns_unknown`\n'
-                '       \tstdin:1\n'
-                '        on line 1 of stdin\n'
+                '       - SassError\n'
+                '        on line 1 of stdin, in function `returns_unknown`\n'
+                '        from line 1 of stdin\n'
                 '>> a { content: returns_unknown(); }\n'
                 '   -------------^\n'
         ):