[gtk-doc] check: simplify custom exception

[Stefan Sauer <stefkost src gnome org>]

commit a44ecff27385f1d0b072ec7e09bbaf70bda8e4c0
Author: Stefan Sauer <ensonic users sf net>
Date:   Mon Apr 17 19:45:33 2017 +0200

    check: simplify custom exception

 gtkdoc/check.py       |    8 +++-----
 tests/gtkdoc-check.py |    6 ++++--
 2 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/gtkdoc/check.py b/gtkdoc/check.py
index a4e93d8..de5eafd 100755
--- a/gtkdoc/check.py
+++ b/gtkdoc/check.py
@@ -34,9 +34,7 @@ from glob import glob
 
 
 class FileFormatError(Exception):
-
-    def __init__(self, detail):
-        self.detail = detail
+    pass
 
 
 def grep(regexp, lines, what):
@@ -93,7 +91,7 @@ def run_tests(workdir, doc_module, doc_main_file):
         incomplete = int(grep(r'^(\d+)\s+symbols?\s+incomplete\.\s*$',
                               statusfile, 'number of incomplete symbols'))
     except FileFormatError as e:
-        print('Cannot find %s in %s' % (e.detail, statusfilename))
+        print('Cannot find %s in %s' % (str(e), statusfilename))
         return checks  # consider all failed
 
     total = undocumented + incomplete
@@ -143,7 +141,7 @@ def run(options=None):
         doc_module = get_variable(os.environ, makefile, 'DOC_MODULE')
         doc_main_file = get_variable(os.environ, makefile, 'DOC_MAIN_SGML_FILE')
     except FileFormatError as e:
-        print('Cannot find %s in %s' % (e.detail, makefilename))
+        print('Cannot find %s in %s' % (str(e), makefilename))
         return 1
 
     doc_main_file = doc_main_file.replace('$(DOC_MODULE)', doc_module)
diff --git a/tests/gtkdoc-check.py b/tests/gtkdoc-check.py
index 6cab062..b8e2b6d 100755
--- a/tests/gtkdoc-check.py
+++ b/tests/gtkdoc-check.py
@@ -4,7 +4,9 @@ import unittest
 
 from gtkdoc import check
 
+
 class TestCheck(unittest.TestCase):
+
     def test_grep_finds_token_in_one_line(self):
         result = check.grep(r'^(foo)', ['foo'], 'foo')
         self.assertEqual('foo', result)
@@ -12,10 +14,10 @@ class TestCheck(unittest.TestCase):
     def test_grep_does_not_find_token(self):
         with self.assertRaises(check.FileFormatError) as ctx:
             check.grep(r'^(foo)', ['bar'], 'foo')
-        self.assertEqual(ctx.exception.detail, 'foo')
+        self.assertEqual(str(ctx.exception), 'foo')
 
     def test_get_variable_prefers_env(self):
-        result = check.get_variable({'foo':'bar'}, ['foo=baz'], 'foo')
+        result = check.get_variable({'foo': 'bar'}, ['foo=baz'], 'foo')
         self.assertEqual('bar', result)
 
     def test_get_variable_finds_in_file(self):