Skip only white spaced lines

diff --git a/abs b/abs
index f24f577..772a628 100755 (executable)
--- a/abs
+++ b/abs
@@ -563,6 +563,8 @@ class Source(object):
             self.b_multi = True
             with open(os.path.join(self.workspace, self.multi_conf_file)) as f:
                 for line in f:
+                    if not line.strip():
+                        continue
                     file_path = os.path.join(self.workspace, line.rstrip())
                     self.project_list.append(self.set_properties(file_path))
         else: