Sitecore App_Config\Include overrides to get encodeNameReplacements to replace spaces with dashes. This also shows using display names with linkProvider.

EncodeNameReplacements.config

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <encodeNameReplacements>
      <replace mode="on" find=" " replaceWith="-" />
    </encodeNameReplacements>
  </sitecore>
</configuration>

LinkProvider.config

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <linkManager defaultProvider="sitecore">
      <providers>
        <clear />
        <add name="sitecore">
          <patch:attribute name="addAspxExtension">false</patch:attribute>
          <patch:attribute name="languageEmbedding">never</patch:attribute>
          <patch:attribute name="alwaysIncludeServerUrl">true</patch:attribute>
          <patch:attribute name="languageLocation">filePath</patch:attribute>
          <patch:attribute name="lowercaseUrls">true</patch:attribute>
          <patch:attribute name="useDisplayName">true</patch:attribute>
        </add>
      </providers>
    </linkManager>
  </sitecore>
</configuration>