Use comment to aid reverting in case the change is problematic

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/diff/lcs/internals.rb b/lib/diff/lcs/internals.rb
index 6e5a962..74f8909 100644
--- a/lib/diff/lcs/internals.rb
+++ b/lib/diff/lcs/internals.rb
@@ -71,6 +71,9 @@ class << Diff::LCS::Internals
       bm = b_matches[ai]
       k = nil
       bm.reverse_each do |j|
+        # Previously, we would update `thresh[k] = j` if `k and (thresh[k] > j) and (thresh[k - 1] < j)`
+        # Otherwise, we would do this. The update appears not to be necessary, so we are trying to
+        # simplify to:
         k = replace_next_larger(thresh, j)
         links[k] = [k.positive? ? links[k - 1] : nil, i, j] unless k.nil?
       end