Good day all--
I've been playing with org-babel-detangle and I've noticed something that's either a bug or a limitation.  It's confusing enough that it's worth writing down if it's expected.  Basically, it doesn't work if there are variables defined in the begin_src header.  I've attached an example below.  The first one won't detangle and the last two will.
* no work#+begin_src sh sh :tangle hw.sh :var x="hello world" :shebang #!/bin/sh :comments linkecho $x#+end_src
* works#+begin_src sh sh :tangle hw2.sh :comments linkecho "helloworld2"#+end_src
* stillworks#+begin_src sh sh :tangle hw3.sh :comments link :shebang #!/bin/shecho "helloworld3"

#+end_src
I've tested with 9.1.7 and 9.1.14 so if this is supposed to be supported it's not something newly broken.
Thx.
--Brad