Fixed typos

- Removed duplicate words, like "the the" and "to to"
- Removed duplicate lines (one double sort line found in mysql.cc)
- Fixed some typos found while searching for duplicate words.

Command used to find duplicate words:
egrep -rI "\s([a-zA-Z]+)\s+\1\s" | grep -v param

Thanks to Artjoms Rimdjonoks for the command and pointing out the
spelling errors.

sql/sql_acl_getsort.inl

@@ -77,7 +77,7 @@
 
   There are two complications caused by multiple wild_many characters.
   For, say, two wild_many characters, either can accept any number of utf8
-  characters, as long the the total amount of them is less then or equal to L.
+  characters, as long the total amount of them is less than or equal to L.
   Same logic applies to any number of non-consequent wild_many characters
   (consequent wild_many characters count as one). This gives the number of
   matching strings of