Removed comma separator (commons-app#5261)

* Removed comma separator from file descriptions

* Removed a redundant line that deleted the last comma of the descriptions

* Added a line to formatDescriptions that replaces every instance of "}}, " with "}}" to remove the comma between descriptions.

* Specified separator as an empty string instead of default value ", " for .joinToString method. Deleted previous fix using .replace method.

* Restored buffer.replace() in updateDescription

Author: paco-arana

app/src/main/java/fr/free/nrw/commons/contributions/Contribution.kt

@@ -111,6 +111,6 @@ data class Contribution constructor(
          */
         fun formatDescriptions(descriptions: List<UploadMediaDetail>) =
             descriptions.filter { it.descriptionText.isNotEmpty() }
-                .joinToString { "{{${it.languageCode}|1=${it.descriptionText}}}" }
+                .joinToString(separator = "") { "{{${it.languageCode}|1=${it.descriptionText}}}" }
     }
 }

app/src/main/java/fr/free/nrw/commons/description/DescriptionEditActivity.kt

@@ -151,7 +151,7 @@ class DescriptionEditActivity : BaseActivity(), UploadMediaDetailAdapter.EventLi
                     buffer.append(uploadDetails.languageCode)
                     buffer.append("|1=")
                     buffer.append(uploadDetails.descriptionText)
-                    buffer.append("}}, ")
+                    buffer.append("}}")
                 }
             }
             buffer.replace(", $".toRegex(), "")