Auto merge of #13272 - linyihai:cargo-add-public-manpage, r=epage

doc: add `public` info in `cargo-add` man page.

### What does this PR try to resolve?
follow up #13046
add `public/private` explanation for `cargo-add` in man page.

### How should we test and review this PR?

### Additional information

Author: bors

src/doc/man/cargo-add.md

@@ -107,6 +107,14 @@ Mark the dependency as [optional](../reference/features.html#optional-dependenci
 Mark the dependency as [required](../reference/features.html#optional-dependencies).
 {{/option}}
 
+{{#option "`--public`" }}
+Mark the dependency as public.
+{{/option}}
+
+{{#option "`--no-public`" }}
+Mark the dependency as private.
+{{/option}}
+
 {{#option "`--no-default-features`" }}
 Disable the [default features](../reference/features.html#dependency-features).
 {{/option}}

src/doc/man/generated_txt/cargo-add.txt

@@ -96,6 +96,12 @@ OPTIONS
            Mark the dependency as required
            <https://doc.rust-lang.org/cargo/reference/features.html#optional-dependencies>.
 
+       --public
+           Mark the dependency as public.
+
+       --no-public
+           Mark the dependency as private.
+
        --no-default-features
            Disable the default features
            <https://doc.rust-lang.org/cargo/reference/features.html#dependency-features>.

src/doc/src/commands/cargo-add.md

@@ -107,6 +107,14 @@ which is defined by the <code>registry.default</code> config key which defaults
 <dd class="option-desc">Mark the dependency as <a href="../reference/features.html#optional-dependencies">required</a>.</dd>
 
 
+<dt class="option-term" id="option-cargo-add---public"><a class="option-anchor" href="#option-cargo-add---public"></a><code>--public</code></dt>
+<dd class="option-desc">Mark the dependency as public.</dd>
+
+
+<dt class="option-term" id="option-cargo-add---no-public"><a class="option-anchor" href="#option-cargo-add---no-public"></a><code>--no-public</code></dt>
+<dd class="option-desc">Mark the dependency as private.</dd>
+
+
 <dt class="option-term" id="option-cargo-add---no-default-features"><a class="option-anchor" href="#option-cargo-add---no-default-features"></a><code>--no-default-features</code></dt>
 <dd class="option-desc">Disable the <a href="../reference/features.html#dependency-features">default features</a>.</dd>
 

src/etc/man/cargo-add.1

@@ -121,6 +121,16 @@ Mark the dependency as \fIoptional\fR <https://doc.rust\-lang.org/cargo/referenc
 Mark the dependency as \fIrequired\fR <https://doc.rust\-lang.org/cargo/reference/features.html#optional\-dependencies>\&.
 .RE
 .sp
+\fB\-\-public\fR
+.RS 4
+Mark the dependency as public.
+.RE
+.sp
+\fB\-\-no\-public\fR
+.RS 4
+Mark the dependency as private.
+.RE
+.sp
 \fB\-\-no\-default\-features\fR
 .RS 4
 Disable the \fIdefault features\fR <https://doc.rust\-lang.org/cargo/reference/features.html#dependency\-features>\&.