Clarify term

Use .. or earlier to clarify.
mroonga · Dec 29, 2015 · 1faeb7d · 1faeb7d
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commit 1faeb7d
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diff --git a/en/_posts/2015-12-29-mroonga-5.11.md b/en/_posts/2015-12-29-mroonga-5.11.md
@@ -28,7 +28,7 @@ Supported MySQL 5.6.28 and 5.7.10 for RPM packages (mysql56-community-mroonga an
 
 #### Supported index table in `match_columns` in script syntax
 
-Before Mroonga 5.10, `-` (hyphen) was used as separator character against an index table. But `-` could't be used in `match_columns` in script syntax (`mroonga_command`), so index table could't be used in `match_columns` in script syntax. Since Mroonga 5.11, index table name separator has been changed to `#` from `-`. It makes that index table can be used in `match_columns` in script syntax. However, there is no impact for many users who uses Mroonga via SQL normally.
+Mroonga 5.10 or earlier, `-` (hyphen) was used as separator character against an index table. But `-` could't be used in `match_columns` in script syntax (`mroonga_command`), so index table could't be used in `match_columns` in script syntax. Since Mroonga 5.11, index table name separator has been changed to `#` from `-`. It makes that index table can be used in `match_columns` in script syntax. However, there is no impact for many users who uses Mroonga via SQL normally.
 
 #### Added a new UDF `mroonga_normalize`