common: Tweak SanitiseLogString() for better display

Some of the functions which use it for backend logging
look a bit weird due to the stripped out line breaks.

This commit ensures there's at least a space between
words, which should help.

Author: justinclift

common/sqlite.go

@@ -1606,7 +1606,7 @@ func SQLiteRunQueryDefensive(w http.ResponseWriter, r *http.Request, querySource
 	var memUsed, memHighWater int64
 	memUsed, memHighWater, dataRows, err = SQLiteRunQuery(sdb, querySource, query, false, false)
 	if err != nil {
-		log.Printf("Error when preparing statement by '%s' for database (%s/%s): '%s'", SanitiseLogString(loggedInUser),
+		log.Printf("Error when running query by '%s' for database (%s/%s): '%s'", SanitiseLogString(loggedInUser),
 			SanitiseLogString(dbOwner), SanitiseLogString(dbName), SanitiseLogString(err.Error()))
 		return SQLiteRecordSet{}, err
 	}

common/userinput.go

@@ -503,9 +503,8 @@ func GetUsername(r *http.Request, allowGet bool) (userName string, err error) {
 }
 
 func SanitiseLogString(v string) (result string) {
-	result = strings.Replace(v, "\n", "", -1)
+	result = strings.Replace(v, "\n", " ", -1)
 	result = strings.Replace(result, "\r", "", -1)
 	result = strings.Replace(result, "'", "\\'", -1)
-
 	return result
 }