docs: More information on what is and isn't included by cargo package

src/doc/man/cargo-package.md

@@ -32,6 +32,16 @@ stored in the `target/package` directory. This performs the following steps:
     - A `.cargo_vcs_info.json` file is included that contains information
       about the current VCS checkout hash if available, as well as a flag if the
       worktree is dirty.
+    - Symlinks are flattened to their target files.
+    - Subdirectories containing `Cargo.toml` are excluded, as they are assumed
+      to be separate packages.
+    - A `target` directory in the root of the package is excluded.
+    - Files and directories matching the `[include]` and `[exclude]` fields in
+      the manifest are included or excluded. Include patterns can override the
+      following rules.
+    - Files that are ignored by VCS are excluded.
+    - Unix hidden files and directories (starting with `.`) are excluded.
+
 3. Extract the `.crate` file and build it to verify it can build.
     - This will rebuild your package from scratch to ensure that it can be
       built from a pristine state. The `--no-verify` flag can be used to skip

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

@@ -14,11 +14,13 @@ DESCRIPTION
        following steps:
 
        1. Load and check the current workspace, performing some basic checks.
+
           o  Path dependencies are not allowed unless they have a version key.
              Cargo will ignore the path key for dependencies in published
              packages. dev-dependencies do not have this restriction.
 
        2. Create the compressed .crate file.
+
           o  The original Cargo.toml file is rewritten and normalized.
 
           o  [patch], [replace], and [workspace] sections are removed from the
@@ -32,7 +34,23 @@ DESCRIPTION
              about the current VCS checkout hash if available, as well as a
              flag if the worktree is dirty.
 
+          o  Symlinks are flattened to their target files.
+
+          o  Subdirectories containing Cargo.toml are excluded, as they are
+             assumed to be separate packages.
+
+          o  A target directory in the root of the package is excluded.
+
+          o  Files and directories matching the [include] and [exclude] fields
+             in the manifest are included or excluded. Include patterns can
+             override the following rules.
+
+          o  Files that are ignored by VCS are excluded.
+
+          o  Unix hidden files and directories (starting with .) are excluded.
+
        3. Extract the .crate file and build it to verify it can build.
+
           o  This will rebuild your package from scratch to ensure that it can
              be built from a pristine state. The --no-verify flag can be used
              to skip this step.

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

@@ -27,6 +27,16 @@ stored in the `target/package` directory. This performs the following steps:
     - A `.cargo_vcs_info.json` file is included that contains information
       about the current VCS checkout hash if available, as well as a flag if the
       worktree is dirty.
+    - Symlinks are flattened to their target files.
+    - Subdirectories containing `Cargo.toml` are excluded, as they are assumed
+      to be separate packages.
+    - A `target` directory in the root of the package is excluded.
+    - Files and directories matching the `[include]` and `[exclude]` fields in
+      the manifest are included or excluded. Include patterns can override the
+      following rules.
+    - Files that are ignored by VCS are excluded.
+    - Unix hidden files and directories (starting with `.`) are excluded.
+
 3. Extract the `.crate` file and build it to verify it can build.
     - This will rebuild your package from scratch to ensure that it can be
       built from a pristine state. The `--no-verify` flag can be used to skip

src/etc/man/cargo-package.1

@@ -45,6 +45,33 @@ packaged lock file if the \fB\-\-locked\fR flag is used.
 about the current VCS checkout hash if available, as well as a flag if the
 worktree is dirty.
 .RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+02'Symlinks are flattened to their target files.
+.RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+02'Subdirectories containing \fBCargo.toml\fR are excluded, as they are assumed
+to be separate packages.
+.RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+02'A \fBtarget\fR directory in the root of the package is excluded.
+.RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+02'Files and directories matching the \fB[include]\fR and \fB[exclude]\fR fields in
+the manifest are included or excluded. Include patterns can override the
+following rules.
+.RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+02'Files that are ignored by VCS are excluded.
+.RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+02'Unix hidden files and directories (starting with \fB\&.\fR) are excluded.
+.RE
 .RE
 .sp
 .RS 4