gbranden pushed a commit to branch master
in repository groff.
commit 256eef0bc0fa733cd10b6e10338617d30d712b71
Author: G. Branden Robinson <[email protected]>
AuthorDate: Fri Nov 22 13:49:02 2024 -0600
HACKING: Add guidance regarding `\]` in regexes.
---
HACKING | 3 +++
1 file changed, 3 insertions(+)
diff --git a/HACKING b/HACKING
index 172a80085..2702eed18 100644
--- a/HACKING
+++ b/HACKING
@@ -175,6 +175,9 @@ Here are some portability notes on writing automated tests.
in Issue 7 (2018) appears unchanged.
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/od.html )
+* Prior to POSIX.1-2024, the meaning of the sequence `\]` in a basic or
+ extended regular expression is undefined. Spell it as `]` instead.
+
* macOS sed requires semicolons after commands even if they are followed
immediately by a closing brace.
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