[Fixed][Diff] Link name for git diffs

- Also adapted file test to new name

kibot/out_diff.py

@@ -305,10 +305,10 @@ class DiffOptions(BaseOptions):
                 self.checkedout = True
             else:
                 name_ori = 'Dirty' if self.git_dirty() else 'HEAD'
-            # A short version of the current hash
-            self.git_hash = self.get_git_point_desc(name_ori)
             # Populate the cache
             hash = self.cache_file()
+            # A short version of the current hash
+            self.git_hash = self.get_git_point_desc(name_ori)
         finally:
             self.undo_git()
         return hash

tests/test_plot/test_misc.py

@@ -1410,6 +1410,6 @@ def test_diff_file_sch_1(test_dir):
     yaml = 'diff_file_sch_'+('k5' if context.ki5() else 'k6')
     ctx = context.TestContext(test_dir, prj, yaml)
     ctx.run()
-    ctx.expect_out_file(prj+'-diff_sch_None-None.pdf')
+    ctx.expect_out_file(prj+'-diff_sch_FILE-Current.pdf')
     ctx.compare_pdf(prj+'-diff_sch.pdf')
     ctx.clean_up(keep_project=True)