patch 8.2.0578: heredoc for interfaces does not support "trim"
Problem: Heredoc for interfaces does not support "trim".
Solution: Update the script heredoc support to be same as the :let command.
(Yegappan Lakshmanan, closes #5916)
diff --git a/src/testdir/test_python2.vim b/src/testdir/test_python2.vim
index 5cee7a7..7be5b40 100644
--- a/src/testdir/test_python2.vim
+++ b/src/testdir/test_python2.vim
@@ -167,3 +167,22 @@
call assert_match( '^Vim(.*):RuntimeError: TEST$', v:exception )
endtry
endfunc
+
+" Test for various heredoc syntax
+func Test_python_heredoc()
+ python << END
+s='A'
+END
+ python <<
+s+='B'
+.
+ python << trim END
+ s+='C'
+ END
+ python << trim
+ s+='D'
+ .
+ call assert_equal('ABCD', pyxeval('s'))
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab