diff --git a/SC2039.md b/SC2039.md
index 4280e8c..74e0986 100644
--- a/SC2039.md
+++ b/SC2039.md
@@ -227,7 +227,6 @@ reuse_quote()(
 reuse_quote "$@"
 ```
 
-
 ### `jobs` flags
 
 The only acceptable flags under POSIX sh for `jobs` are `-l` and `-p` ([see spec](https://pubs.opengroup.org/onlinepubs/9699919799/utilities/jobs.html)). Common flags supported by other shells are `-s` and `-r`, to check for stopped/suspended jobs and running jobs. A portable alternative is using `grep` or `awk`:
@@ -251,20 +250,6 @@ command > file 2>&1 or command 2>&1 | othercommand
 
 No Comments / Exceptions
 
-### Heredoc
-
-Change:
-```
-sed 's/some_replacement//g' <<< "${var}"
-```
-
-To:
-```
-printf '%s' "${var}" | sed 's/some_replacement//g'
-```
-
-No Comments / Exceptions
-
 ### Prefixing signal names with `SIG`
 
 Instead of e.g.:
@@ -275,10 +260,14 @@ trap my_handler SIGTERM
 use:
 ```sh
 trap my_handler TERM
-# or (`trap -l` for a list of signal numbers):
+# or (`trap -l` for a list of signal numbers; not every one is portable!)
 trap my_handler 15
 ```
 
 ## Exception
 
-Depends on what your expected POSIX shell providers would use.
\ No newline at end of file
+Depends on what your expected POSIX shell providers would use.
+
+Some features have POSIX proposals:
+* `local`: https://www.austingroupbugs.net/bug_view_page.php?bug_id=767
+* `$'c-style-escape'`: see above
\ No newline at end of file