Fix typos.
diff --git a/src/hb-common.cc b/src/hb-common.cc
index 1d0e726..d1fcf79 100644
--- a/src/hb-common.cc
+++ b/src/hb-common.cc
@@ -879,7 +879,7 @@
                    parse_bool (pp, end, &feature->value);
   /* CSS doesn't use equal-sign between tag and value.
    * If there was an equal-sign, then there *must* be a value.
-   * A value without an eqaul-sign is ok, but not required. */
+   * A value without an equal-sign is ok, but not required. */
   return !had_equal || had_value;
 }