fix(writeout_unidiff): notify about missing newline

Print 'diff'-like message about missing newline. Previously if .result file was missing a newline the output would be the following: [047] --- [047] -...+... [047] After this patch: [047] --- [047] -... [047] \ No newline [047] +... [047] Closes #212
tarantool · Jun 10, 2020 · d920322 · d920322
1 parent 1152183
commit d920322
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/lib/colorer.py b/lib/colorer.py
@@ -221,6 +221,10 @@ def __call__(self, *args, **kwargs):
 
     def writeout_unidiff(self, diff):
         for i in diff:
+
+            if not i.endswith('\n'):
+                i += "\n\\ No newline\n"
+
             if i.startswith('+'):
                 self.write(i, schema='diff_in')
             elif i.startswith('-'):