fix easy typos

src/core/or/dos.c

@@ -534,7 +534,7 @@ conn_update_on_close(conn_client_stats_t *stats, const tor_addr_t *addr)
 {
   /* Extra super duper safety. Going below 0 means an underflow which could
    * lead to most likely a false positive. In theory, this should never happen
-   * but lets be extra safe. */
+   * but let's be extra safe. */
   if (BUG(stats->concurrent_count == 0)) {
     return;
   }

src/feature/stats/rephist.c

@@ -2114,7 +2114,7 @@ static overload_onionskin_assessment_t overload_onionskin_assessment;
 
 /**
  * We combine ntorv3 and ntor into the same stat, so we must
- * use this function to covert the cell type to a stat index.
+ * use this function to convert the cell type to a stat index.
  */
 static inline uint16_t
 onionskin_type_to_stat(uint16_t type)
@@ -2137,7 +2137,7 @@ onionskin_type_to_stat(uint16_t type)
  * the stats are reset back to 0 and the assessment time period updated.
  *
  * This is called when a ntor handshake is _requested_ because we want to avoid
- * to have an assymetric situation where requested counter is reset to 0 but
+ * to have an asymmetric situation where requested counter is reset to 0 but
  * then a drop happens leading to the drop counter being incremented while the
  * requested counter is 0. */
 static void