fix: do not escape space between PyPI repository url and package name… (#23981)

…; add trailing slash to PyPI repository URL (in accordance to PEP-503)

This should solve Issue #23980, by moving the space in front of the
package name and the package name out of the `gitea-origin-url` block.
It also adds a trailing slash to the PyPI repository URL in accordance
to [Python PEP-503](https://peps.python.org/pep-0503/).

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

templates/package/content/pypi.tmpl

@@ -4,7 +4,7 @@
 		<div class="ui form">
 			<div class="field">
 				<label>{{svg "octicon-terminal"}} {{.locale.Tr "packages.pypi.install"}}</label>
-				<div class="markup"><pre class="code-block"><code>pip install --index-url <gitea-origin-url data-url="{{AppSubUrl}}/api/packages/{{.PackageDescriptor.Owner.Name}}/pypi/simple {{.PackageDescriptor.Package.Name}}"></gitea-origin-url></code></pre></div>
+				<div class="markup"><pre class="code-block"><code>pip install --index-url <gitea-origin-url data-url="{{AppSubUrl}}/api/packages/{{.PackageDescriptor.Owner.Name}}/pypi/simple/"></gitea-origin-url> {{.PackageDescriptor.Package.Name}}</code></pre></div>
 			</div>
 			<div class="field">
 				<label>{{.locale.Tr "packages.pypi.documentation" | Safe}}</label>