The technical term for that is "a Lava Flow".
The code melts and changes for awhile... and then congeals into unchanging rock again.
The code melts and changes for awhile... and then congeals into unchanging rock again.
One project I worked on had almost a half dozen "lava flows" in the JavaScript alone... I had a hard time convincing folks we could rewrite it using ASTs because all the rewrites scared folks away from any further rewrites!