Refactor translation to use gl-sprintf

app/assets/javascripts/diffs/components/compare_versions.vue

 <script>
 import { mapActions, mapGetters, mapState } from 'vuex';
-import { GlTooltipDirective, GlLink, GlButton } from '@gitlab/ui';
+import { GlTooltipDirective, GlLink, GlButton, GlSprintf } from '@gitlab/ui';
 import { __ } from '~/locale';
 import { polyfillSticky } from '~/lib/utils/sticky';
 import Icon from '~/vue_shared/components/icon.vue';
@@ -15,6 +15,7 @@ export default {
     Icon,
     GlLink,
     GlButton,
+    GlSprintf,
     SettingsDropdown,
     DiffStats,
   },
@@ -106,15 +107,20 @@ export default {
       >
         <icon name="file-tree" />
       </button>
-      <div v-if="showDropdowns" class="d-flex align-items-center compare-versions-container">
-        {{ __('Compare') }}
+      <gl-sprintf
+        v-if="showDropdowns"
+        class="d-flex align-items-center compare-versions-container"
+        :message="s__('MergeRequest|Compare %{source} and %{target}')"
+      >
+        <template #source>
           <compare-versions-dropdown
             :other-versions="mergeRequestDiffs"
             :merge-request-version="mergeRequestDiff"
             :show-commit-count="true"
             class="mr-version-dropdown"
           />
-        {{ __('and') }}
+        </template>
+        <template #target>
           <compare-versions-dropdown
             :other-versions="comparableDiffs"
             :base-version-path="baseVersionPath"
@@ -122,7 +128,8 @@ export default {
             :target-branch="targetBranch"
             class="mr-version-compare-dropdown"
           />
-      </div>
+        </template>
+      </gl-sprintf>
       <div v-else-if="commit">
         {{ __('Viewing commit') }}
         <gl-link :href="commit.commit_url" class="monospace">{{ commit.short_id }}</gl-link>

locale/gitlab.pot

@@ -11944,6 +11944,9 @@ msgstr ""
 msgid "MergeRequests|started a thread on commit %{linkStart}%{commitDisplay}%{linkEnd}"
 msgstr ""
 
+msgid "MergeRequest|Compare %{source} and %{target}"
+msgstr ""
+
 msgid "MergeRequest|Error dismissing suggestion popover. Please try again."
 msgstr ""
 
@@ -22255,9 +22258,6 @@ msgstr ""
 msgid "among other things"
 msgstr ""
 
-msgid "and"
-msgstr ""
-
 msgid "any-approver for the merge request already exists"
 msgstr ""