[cindex.py] Fix comments

llvm-svn: 159492

clang/bindings/python/clang/cindex.py

@@ -2206,7 +2206,7 @@ class CompilationDatabase(ClangObject):
     def getCompileCommands(self, filename):
         """
         Get an iterable object providing all the CompileCommands available to
-        build filename. Raise KeyError if filename is not found in the database.
+        build filename. Returns None if filename is not found in the database.
         """
         return CompilationDatabase_getCompileCommands(self, filename)
 

clang/bindings/python/tests/cindex/test_cdb.py

@@ -22,7 +22,7 @@ def test_create():
     cdb = CompilationDatabase.fromDirectory(kInputsDir)
 
 def test_lookup_fail():
-    """Check an assertion is raised when file lookup failed"""
+    """Check file lookup failure"""
     cdb = CompilationDatabase.fromDirectory(kInputsDir)
     assert cdb.getCompileCommands('file_do_not_exist.cpp') == None