doc: check for absence of multiple terms in each entry of desc list

For simplifying automated translation of the documentation, it is better to
only present one term in each entry of a description list of options. This
is because most of these terms can automatically be marked as
notranslatable.

Also, due to portability issues, the script generate-configlist.sh can no
longer insert newlines in the output. However, the result is that it no
longer correctly handles multiple terms in a single entry of definition
lists.

As a result, we now check that these entries do not exist in the
documentation.

Reviewed-by: Collin Funk <collin.funk1@gmail.com>
Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/Makefile

@@ -508,6 +508,15 @@ $(LINT_DOCS_DELIMITED_SECTIONS): .build/lint-docs/delimited-sections/%.ok: %.ado
 .PHONY: lint-docs-delimited-sections
 lint-docs-delimited-sections: $(LINT_DOCS_DELIMITED_SECTIONS)
 
+## Lint: Documentation style
+LINT_DOCS_DOC_STYLE = $(patsubst %.adoc,.build/lint-docs/doc-style/%.ok,$(DOC_DEP_TXT))
+$(LINT_DOCS_DOC_STYLE): lint-documentation-style.perl
+$(LINT_DOCS_DOC_STYLE): .build/lint-docs/doc-style/%.ok: %.adoc
+	$(call mkdir_p_parent_template)
+	$(QUIET_LINT_DOCSTYLE)$(PERL_PATH) lint-documentation-style.perl $< >$@
+.PHONY: lint-docs-doc-style
+lint-docs-doc-style: $(LINT_DOCS_DOC_STYLE)
+
 lint-docs-manpages:
 	$(QUIET_GEN)./lint-manpages.sh
 
@@ -537,6 +546,7 @@ lint-docs: lint-docs-gitlink
 lint-docs: lint-docs-man-end-blurb
 lint-docs: lint-docs-man-section-order
 lint-docs: lint-docs-delimited-sections
+lint-docs: lint-docs-doc-style
 lint-docs: lint-docs-manpages
 lint-docs: lint-docs-meson
 

Documentation/git-check-attr.adoc

@@ -19,7 +19,8 @@ For every pathname, this command will list if each attribute is 'unspecified',
 
 OPTIONS
 -------
--a, --all::
+-a::
+--all::
 	List all attributes that are associated with the specified
 	paths.  If this option is used, then 'unspecified' attributes
 	will not be included in the output.

Documentation/git-check-ignore.adoc

@@ -25,11 +25,13 @@ subject to exclude rules; but see `--no-index'.
 
 OPTIONS
 -------
--q, --quiet::
+-q::
+--quiet::
 	Don't output anything, just set exit status.  This is only
 	valid with a single pathname.
 
--v, --verbose::
+-v::
+--verbose::
 	Instead of printing the paths that are excluded, for each path
 	that matches an exclude pattern, print the exclude pattern
 	together with the path.  (Matching an exclude pattern usually
@@ -49,7 +51,8 @@ linkgit:gitignore[5].
 	below).  If `--stdin` is also given, input paths are separated
 	with a NUL character instead of a linefeed character.
 
--n, --non-matching::
+-n::
+--non-matching::
 	Show given paths which don't match any pattern.  This only
 	makes sense when `--verbose` is enabled, otherwise it would
 	not be possible to distinguish between paths which match a

Documentation/git-http-fetch.adoc

@@ -25,8 +25,11 @@ commit-id::
         Either the hash or the filename under [URL]/refs/ to
         pull.
 
--a, -c, -t::
+-a::
+-c::
+-t::
 	These options are ignored for historical reasons.
+
 -v::
 	Report what is downloaded.
 

Documentation/lint-documentation-style.perl

@@ -0,0 +1,24 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+my $exit_code = 0;
+sub report {
+	my ($line, $msg) = @_;
+	chomp $line;
+	print STDERR "$ARGV:$.: '$line' $msg\n";
+	$exit_code = 1;
+}
+
+my $synopsis_style = 0;
+
+while (my $line = <>) {
+	if ($line =~ /^[ \t]*`?[-a-z0-9.]+`?(, `?[-a-z0-9.]+`?)+(::|;;)$/) {
+
+		report($line, "multiple parameters in a definition list item");
+	}
+}
+
+
+exit $exit_code;

Documentation/technical/api-path-walk.adoc

@@ -39,7 +39,10 @@ It is also important that you do not specify the `--objects` flag for the
 the objects will be walked in a separate way based on those starting
 commits.
 
-`commits`, `blobs`, `trees`, `tags`::
+`commits`::
+`blobs`::
+`trees`::
+`tags`::
 	By default, these members are enabled and signal that the path-walk
 	API should call the `path_fn` on objects of these types. Specialized
 	applications could disable some options to make it simpler to walk

shared.mak

@@ -89,6 +89,7 @@ ifndef V
 	QUIET_LINT_GITLINK	= @echo '   ' LINT GITLINK $<;
 	QUIET_LINT_MANSEC	= @echo '   ' LINT MAN SEC $<;
 	QUIET_LINT_DELIMSEC	= @echo '   ' LINT DEL SEC $<;
+	QUIET_LINT_DOCSTYLE	= @echo '   ' LINT DOCSTYLE $<;
 	QUIET_LINT_MANEND	= @echo '   ' LINT MAN END $<;
 
 	export V