Improve method to sanitize values

src/modules/NtpClient.rb

@@ -989,11 +989,18 @@ def AutoPackages
 
     # Remove blank spaces in values
     #
-    # @note comments are kept untouched to avoid possible errors with
-    #   inline comments that could produce entries like: trustedkey 1# comment
+    # @note to avoid augeas parsing errors, comments should be sanitized by
+    #   removing blank spaces at the beginning and adding line break.
     def sanitize_record(record)
       sanitized = record.dup
-      sanitized.each_key { |k| sanitized[k].strip! unless k.include?("comment") }
+      sanitized.each do |key, value|
+        if key.include?("comment")
+          value.sub!(/^ */, "")
+          value << "\n" unless value.include?("\n")
+        elsif value.respond_to?(:strip!)
+          value.strip!
+        end
+      end
       sanitized
     end
 

test/ntp_client_test.rb

@@ -54,9 +54,9 @@
           expect(record["address"]).to eq "0.opensuse.pool.ntp.org"
         end
 
-        it "keeps comments untouched" do
+        it "sanitizes comments by removing blank spaces at the beginning and adding line break" do
           record = subject.ntp_records.first
-          expect(record["comment"]).to eq " # a comment with spaces "
+          expect(record["comment"]).to eq "# a comment with spaces \n"
         end
 
         it "reads the list of peers" do