CONTRIBUTING: made better

CONTRIBUTING

@@ -1,26 +1,29 @@
 Make sure to read our code of conduct in the CONDUCT file.
 
-When contributing a pull request to the main branch, please sign your commits
-with a PGP key and add your name and the year to the bottom of the list of
-copyright holders for the file. For example, an existing copyright header might
-read:
+
+Copyright Information
+=====================
+
+When editing a file, create a copyright statement correlated to your
+identity so that it is easier to keep track of who has touched what file.
+Pseudonymous contributions are welcome (and encouraged). Place new copyright
+information below existing copyright information. If there is an existing
+copyright statement:
 
  * Copyright (c) 2022–2023 Emma Tebibyte <emma@tebibyte.media>
 
-You would add your name below it like this:
+you would add your name below it like this:
 
  * Copyright (c) 2022–2023 Emma Tebibyte <emma@tebibyte.media>
  * Copyright (c) 20XX Your Name <your e-mail address or website>
 
-We accept contributions from people using aliases.
-
 Only list years in which you modified the source file. For example:
 
  * Copyright (c) 2020–2021, 2023 Your Name <your-address@example.com>
 
 This header shows that “Your Name” worked on this source file in 2020, 2021, and
-2023. Please use the en dash (“–”) to separate the years in the copyright
-notice.
+2023. Please use the en dash (“–”, U+2013) to separate consecutive years in the
+copyright notice.
 
 If you are contributing a new file, please prepend the following license header
 text to it, replacing the proper text on the copyright line:
@@ -92,6 +95,10 @@ notice:
  *     USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+
+Style
+=====
+
 Make sure lines never exceed 80 columns in width when using four-character
 indentation steps. This helps contributors with smaller screens, those using
 side-by-side editor windows or panes, and those who have no text wrapping in
@@ -99,12 +106,16 @@ their editor or terminal.
 
 For usage text and help messages, do not implement a -h option. Instead, print
 usage information when any erroneous option is specified. Follow the NetBSD
-style guide for the usage text’s output format [1].
+style guide for the usage text’s output format [0].
 
-[1] <http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/share/misc/style>
 
-If committing a new source file, format the commit message following these
-guidelines:
+Committing
+==========
+
+When contributing to Bonsai, please sign your commit with a PGP key and create
+the commit with an identity which can be easily contacted.
+
+Format commit messages following these guidelines:
 
 $ git commit -m 'tool(1): add feature x'
 
@@ -130,6 +141,13 @@ $ git commit -m 'tool(1): fix #42 & add feature x'
 
 Commit messages should be written in the present tense.
 
+
+References
+==========
+
+[0] <http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/share/misc/style>
+
+
 --
 This work © 2023–2024 by Emma Tebibyte is licensed under CC BY-SA 4.0. To view a
 copy of this license, visit <http://creativecommons.org/licenses/by-sa/4.0/>