Merge branch 'js/contributor-docs-updates' into maint-2.43

Doc update.

* js/contributor-docs-updates:
  SubmittingPatches: hyphenate non-ASCII
  SubmittingPatches: clarify GitHub artifact format
  SubmittingPatches: clarify GitHub visual
  SubmittingPatches: provide tag naming advice
  SubmittingPatches: update extra tags list
  SubmittingPatches: discourage new trailers
  SubmittingPatches: drop ref to "What's in git.git"
  CodingGuidelines: write punctuation marks
  CodingGuidelines: move period inside parentheses

Documentation/CodingGuidelines

@@ -450,7 +450,7 @@ For C programs:
    one of the approved headers that includes it first for you.  (The
    approved headers currently include "builtin.h",
    "t/helper/test-tool.h", "xdiff/xinclude.h", or
-   "reftable/system.h").  You do not have to include more than one of
+   "reftable/system.h".)  You do not have to include more than one of
    these.
 
  - A C file must directly include the header files that declare the
@@ -578,7 +578,7 @@ Externally Visible Names
    . The variable name describes the effect of tweaking this knob.
 
    The section and variable names that consist of multiple words are
-   formed by concatenating the words without punctuations (e.g. `-`),
+   formed by concatenating the words without punctuation marks (e.g. `-`),
    and are broken using bumpyCaps in documentation as a hint to the
    reader.