Quote all install command components that aren't a bare package name

* As a means to make things easier for new users, quote everything in
  a `pip install` command that is part of a package that isn't just
  a bare package name.
* Use single quotes for Linux/Mac and use double quotes for Windows
  to follow existing style conventions.

docs/html/cli/pip_install.rst

@@ -11,7 +11,7 @@ Usage
 
 .. tab:: Unix/macOS
 
-   .. pip-command-usage:: install "python -m pip"
+   .. pip-command-usage:: install 'python -m pip'
 
 .. tab:: Windows
 
@@ -277,16 +277,16 @@ Examples
       .. code-block:: shell
 
          python -m pip install SomePackage            # latest version
-         python -m pip install SomePackage==1.0.4     # specific version
+         python -m pip install 'SomePackage==1.0.4'   # specific version
          python -m pip install 'SomePackage>=1.0.4'   # minimum version
 
    .. tab:: Windows
 
       .. code-block:: shell
 
          py -m pip install SomePackage            # latest version
-         py -m pip install SomePackage==1.0.4     # specific version
-         py -m pip install 'SomePackage>=1.0.4'   # minimum version
+         py -m pip install "SomePackage==1.0.4"   # specific version
+         py -m pip install "SomePackage>=1.0.4"   # minimum version
 
 
 #. Install a list of requirements specified in a file.  See the :ref:`Requirements files <Requirements Files>`.
@@ -349,13 +349,13 @@ Examples
 
       .. code-block:: shell
 
-         python -m pip install SomeProject@git+https://git.repo/[email protected]
+         python -m pip install 'SomeProject@git+https://git.repo/[email protected]'
 
    .. tab:: Windows
 
       .. code-block:: shell
 
-         py -m pip install SomeProject@git+https://git.repo/[email protected]
+         py -m pip install "SomeProject@git+https://git.repo/[email protected]"
 
 
 #. Install a project from VCS in "editable" mode. See the sections on :doc:`../topics/vcs-support` and :ref:`Editable Installs <editable-installs>`.
@@ -364,20 +364,20 @@ Examples
 
       .. code-block:: shell
 
-         python -m pip install -e git+https://git.repo/some_pkg.git#egg=SomePackage          # from git
-         python -m pip install -e hg+https://hg.repo/some_pkg.git#egg=SomePackage            # from mercurial
-         python -m pip install -e svn+svn://svn.repo/some_pkg/trunk/#egg=SomePackage         # from svn
-         python -m pip install -e git+https://git.repo/some_pkg.git@feature#egg=SomePackage  # from 'feature' branch
-         python -m pip install -e "git+https://git.repo/some_repo.git#egg=subdir&subdirectory=subdir_path" # install a python package from a repo subdirectory
+         python -m pip install -e 'git+https://git.repo/some_pkg.git#egg=SomePackage'          # from git
+         python -m pip install -e 'hg+https://hg.repo/some_pkg.git#egg=SomePackage'            # from mercurial
+         python -m pip install -e 'svn+svn://svn.repo/some_pkg/trunk/#egg=SomePackage'         # from svn
+         python -m pip install -e 'git+https://git.repo/some_pkg.git@feature#egg=SomePackage'  # from 'feature' branch
+         python -m pip install -e 'git+https://git.repo/some_repo.git#egg=subdir&subdirectory=subdir_path' # install a python package from a repo subdirectory
 
    .. tab:: Windows
 
       .. code-block:: shell
 
-         py -m pip install -e git+https://git.repo/some_pkg.git#egg=SomePackage          # from git
-         py -m pip install -e hg+https://hg.repo/some_pkg.git#egg=SomePackage            # from mercurial
-         py -m pip install -e svn+svn://svn.repo/some_pkg/trunk/#egg=SomePackage         # from svn
-         py -m pip install -e git+https://git.repo/some_pkg.git@feature#egg=SomePackage  # from 'feature' branch
+         py -m pip install -e "git+https://git.repo/some_pkg.git#egg=SomePackage"          # from git
+         py -m pip install -e "hg+https://hg.repo/some_pkg.git#egg=SomePackage"            # from mercurial
+         py -m pip install -e "svn+svn://svn.repo/some_pkg/trunk/#egg=SomePackage"         # from svn
+         py -m pip install -e "git+https://git.repo/some_pkg.git@feature#egg=SomePackage"  # from 'feature' branch
          py -m pip install -e "git+https://git.repo/some_repo.git#egg=subdir&subdirectory=subdir_path" # install a python package from a repo subdirectory
 
 #. Install a package with `extras`_.
@@ -408,33 +408,33 @@ Examples
 
       .. code-block:: shell
 
-         python -m pip install ./downloads/SomePackage-1.0.4.tar.gz
-         python -m pip install http://my.package.repo/SomePackage-1.0.4.zip
+         python -m pip install './downloads/SomePackage-1.0.4.tar.gz'
+         python -m pip install 'http://my.package.repo/SomePackage-1.0.4.zip'
 
    .. tab:: Windows
 
       .. code-block:: shell
 
-         py -m pip install ./downloads/SomePackage-1.0.4.tar.gz
-         py -m pip install http://my.package.repo/SomePackage-1.0.4.zip
+         py -m pip install "./downloads/SomePackage-1.0.4.tar.gz"
+         py -m pip install "http://my.package.repo/SomePackage-1.0.4.zip"
 
 #. Install a particular source archive file following :pep:`440` direct references.
 
    .. tab:: Unix/macOS
 
       .. code-block:: shell
 
-         python -m pip install SomeProject@http://my.package.repo/SomeProject-1.2.3-py33-none-any.whl
-         python -m pip install "SomeProject @ http://my.package.repo/SomeProject-1.2.3-py33-none-any.whl"
-         python -m pip install SomeProject@http://my.package.repo/1.2.3.tar.gz
+         python -m pip install 'SomeProject@http://my.package.repo/SomeProject-1.2.3-py33-none-any.whl'
+         python -m pip install 'SomeProject @ http://my.package.repo/SomeProject-1.2.3-py33-none-any.whl'
+         python -m pip install 'SomeProject@http://my.package.repo/1.2.3.tar.gz'
 
    .. tab:: Windows
 
       .. code-block:: shell
 
-         py -m pip install SomeProject@http://my.package.repo/SomeProject-1.2.3-py33-none-any.whl
+         py -m pip install "SomeProject@http://my.package.repo/SomeProject-1.2.3-py33-none-any.whl"
          py -m pip install "SomeProject @ http://my.package.repo/SomeProject-1.2.3-py33-none-any.whl"
-         py -m pip install SomeProject@http://my.package.repo/1.2.3.tar.gz
+         py -m pip install "SomeProject@http://my.package.repo/1.2.3.tar.gz"
 
 #. Install from alternative package repositories.