New checker: git_diff_numstat

check/git_diff_numstat

+#!/bin/bash
+
+# We want to keep the nodes on their original line when applying a fixer, i.e.
+# - Do not add / delete lines
+# - Do not move the nodes from one line to another
+#
+# After applying a fixer, this script is used to manually check the difference
+# between the number of lines added and deleted. If this value is other than 0,
+# it means that the fixer does not handle certain cases well, i.e. the
+# implementation of its `transform` method is not good enough.
+
+cd $1
+git diff --numstat | while read insertions deletions file; do
+  if [ $insertions -ne $deletions ]; then
+    echo $file $insertions+ $deletions-
+  fi
+done