[IMP] web: multi-line many2one: only highlight first line

Rev. a3489be33 removed this feature to fix a bug (when the single
line many2one, e.g. a product, is too long and displayed over
several lines). However, we (fp) still want this for res_partner
many2ones with show_adress.

This rev. re-introduced the feature without re-introducing the bug.

closes odoo/odoo#33139

Signed-off-by: VincentSchippefilt <VincentSchippefilt@users.noreply.github.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/addons/web/static/src/js/fields/relational_fields.js b/addons/web/static/src/js/fields/relational_fields.js
index 751c16b3a23..325e0ceb8e8 100644
--- a/addons/web/static/src/js/fields/relational_fields.js
+++ b/addons/web/static/src/js/fields/relational_fields.js
@@ -465,7 +465,10 @@ var FieldMany2One = AbstractField.extend({
      * @private
      */
     _renderReadonly: function () {
-        var value = _.escape((this.m2o_value || "").trim()).split("\n").join("<br/>");
+        var escapedValue = _.escape((this.m2o_value || "").trim());
+        var value = escapedValue.split('\n').map(function (line) {
+            return '<span>' + line + '</span>';
+        }).join('<br/>');
         this.$el.html(value);
         if (!this.noOpen && this.value) {
             this.$el.attr('href', _.str.sprintf('#id=%s&model=%s', this.value.res_id, this.field.relation));