cmd/shfmt: show broken behavior in test for #1102

Author: mvdan

cmd/shfmt/testdata/script/editorconfig.txtar

@@ -12,11 +12,13 @@ exec shfmt
 
 stdin stdin-filename-bash
 ! exec shfmt -filename=foo_posix.sh
-stderr '^foo_posix.sh:.* arrays are a bash'
+# TODO: we didn't parse as bash!
+stderr '^foo_posix.sh:.* arrays are a bash.*parsed as bash via -ln=auto'
 
 stdin stdin-filename-bash
 ! exec shfmt -filename=${WORK}/foo_posix.sh
-stderr ^${WORK@R}/'foo_posix.sh:.* arrays are a bash'
+# TODO: we didn't parse as bash!
+stderr ^${WORK@R}/'foo_posix.sh:.* arrays are a bash.*parsed as bash via -ln=auto'
 
 # Using a file path should use EditorConfig, including with the use of flags
 # like -l.