Fix formatting bug caused by strings containing \r

src/misc_tools.c

@@ -372,14 +372,22 @@ on_error:
     return len;
 }
 
-/* copies data to msg buffer.
+/* copies data to msg buffer, removing return characters.
    returns length of msg, which will be no larger than size-1 */
 size_t copy_tox_str(char *msg, size_t size, const char *data, size_t length)
 {
-    size_t len = MIN(length, size - 1);
-    memcpy(msg, data, len);
-    msg[len] = '\0';
-    return len;
+    size_t i;
+    size_t j = 0;
+
+    for (i = 0; (i < length) && (j < size - 1); ++i) {
+        if (data[i] != '\r') {
+            msg[j++] = data[i];
+        }
+    }
+
+    msg[j] = '\0';
+
+    return j;
 }
 
 /* returns index of the first instance of ch in s starting at idx.