contrib/script: error text corrections in check_updates.sh

Fix a factual error in the /contrib/check_updates.sh error message text,
Best shown in an example from the latest travis build error:
```
$ ./contrib/check_updates.sh auth auth
Database Updater check script:
  Checking database 'auth' for missing filenames in tables...

- "sql/updates/2015_10_09_00_auth.sql" is missing in table 'auth'.'updates'

Fatal error:
  The Database Updater is broken for database 'auth
  due to applied update which are missing in the 'auth'.'updates' table.

How to fix:
  Insert the missing names of sql updates which were applied already to
  the 'updates' table of the 'auth' base dump ('sql/base/auth_database.sql').

The command "./contrib/check_updates.sh auth auth" exited with 1.
```
Main fix: `\"sql/updates/${file}\"` -> `\"sql/updates/${name}/${file}\"`

Before this change, the error message claims that the updated SQL file was placed
directly in the `/sql/updates/` directory and not in the subdirectory based on its DB name.

All the other changes are improvements in English grammar and more precise description.

1 files changed, 6 insertions, 6 deletions

diff --git a/contrib/check_updates.sh b/contrib/check_updates.sh
index 97aa3dff7a8..017542eb807 100644
--- a/contrib/check_updates.sh
+++ b/contrib/check_updates.sh
@@ -22,7 +22,7 @@ do
   updates=$((updates+1))
  else
   # The update isn't listed in the updates table of the given database.
-  echo "- \"sql/updates/${file}\" is missing in table '${name}'.'updates'"
+  echo "- \"sql/updates/${name}/${file}\" is missing in the '${name}'.'updates' table."
   error=1
  fi
 done
@@ -31,14 +31,14 @@ if [ ${error} -ne 0 ]
   then
     echo
     echo "Fatal error:"
-    echo "  The Database Updater is broken for database '${name}"
-    echo "  due to applied update which are missing in the '${name}'.'updates' table."
+    echo "  The Database Updater is broken for the '${name}' database,"
+    echo "  because the applied update is missing in the '${name}'.'updates' table."
     echo
     echo "How to fix:"
-    echo "  Insert the missing names of sql updates which were applied already to"
-    echo "  the 'updates' table of the '${name}' base dump ('sql/base/${name}_database.sql')."
+    echo "  Insert the missing names of the already applied sql updates"
+    echo "  to the 'updates' table of the '${name}' base dump ('sql/base/${name}_database.sql')."
     exit 1
   else
-    echo "  Everything is ok, checked ${updates} updates."
+    echo "  Everything is OK, finished checking ${updates} updates."
     exit 0
 fi