DocumentationComment: Fix missing ending colon

Fix for missing ending colon, which made parser
to break.
Fixes #2143

coalib/bearlib/languages/documentation/DocumentationComment.py

@@ -131,6 +131,11 @@ def _parse_documentation_with_symbols(self,
                 # splitted contains the whole line from the param's name,
                 # which in turn is further divided into its name and desc.
                 splitted = line[param_offset:].split(param_identifiers[1], 1)
+                # parser breaks if param_identifiers[1] is not present.
+                # This checks for space and then splits the line accordingly
+                # to extract param's name and desc.
+                if len(splitted) == 1:
+                    splitted = line[param_offset:].split(' ', 1)
                 cur_param = splitted[0].strip()
 
                 param_desc = splitted[1]
@@ -143,6 +148,11 @@ def _parse_documentation_with_symbols(self,
                     exception_identifiers[0]) + len(exception_identifiers[0])
                 splitted = line[exception_offset:].split(
                     exception_identifiers[1], 1)
+                # parser breaks if exception_identifiers[1] is not present.
+                # This checks for space and then splits the line accordingly
+                # to extract exception's name and desc.
+                if len(splitted) == 1:
+                    splitted = line[exception_offset:].split(' ', 1)
                 cur_exception = splitted[0].strip()
 
                 exception_desc = splitted[1]

tests/bearlib/languages/documentation/DocumentationCommentTest.py

@@ -214,6 +214,17 @@ def test_python_doxygen(self):
 
         self.assertEqual(parsed_docs, expected)
 
+    def test_python_missing_ending_colon(self):
+        doc = (' This is a malformed docstring\n'
+               ' :param abc  test description1\n'
+               ' :raises xyz  test description2\n')
+        expected = [self.Description(desc=' This is a malformed docstring\n'),
+                    self.Parameter(name='abc',
+                                   desc=' test description1\n'),
+                    self.ExceptionValue(name='xyz',
+                                        desc=' test description2\n')]
+        self.check_docstring(doc, expected)
+
 
 class JavaDocumentationCommentTest(DocumentationCommentTest):