isort changes the content of multiline strings after a yield statement

[progval]

Hi,

If there is a yield statement in a file, isort alters multiline strings that contain the word "from":

$ cat db.py                           
def a():
    yield f(
        """
        select %s from (values %%s) as t(%s)
        """
    )

def b():
    return (
        """
        select name
        from foo
        """
        % main_table
    )

def c():
    query = (
        """
        select {keys}
        from (values %s) as t(id)
        """
    )

def d():
    query = f"""select t.id
                from {table} t
                {extra}"""

$ isort --diff db.py 
--- /home/dev/swh-environment/swh-indexer/db.py:before	2020-09-29 17:30:57.737760
+++ /home/dev/swh-environment/swh-indexer/db.py:after	2020-09-29 17:44:02.722392
@@ -9,7 +9,6 @@
     return (
         """
         select name
-        from foo
         """
         % main_table
     )
@@ -18,12 +17,11 @@
     query = (
         """
         select {keys}
-        from (values %s) as t(id)
+        from values%s import ast, id
         """
     )
 
 def d():
     query = f"""select t.id
-                from {table} t
                 {extra}"""

$ isort -V                            

                 _                 _
                (_) ___  ___  _ __| |_
                | |/ _/ / _ \/ '__  _/
                | |\__ \/\_\/| |  | |_
                |_|\___/\___/\_/   \_/

      isort your imports, so you don't have to.

                    VERSION 5.5.3

isort was installed using pip3 install --user isort earlier today.

[timothycrosley]

Thank you for reporting this major issue! A 5.5.4 hot fix release was released that resolves it and I was able to confirm it is only present in the 5.5.3 release.

Thanks!

~Timothy

[progval]

thanks!