45 typo fixes

* 15  occurence → occurrence
* 15  occurences → occurrences
*  4  insenstive → insensitive
*  4  overriden → overridden
*  2  return a the → return the
*  2  splitted → split
*  1  chache → cache
*  1  generator which yield → generator which yields
*  1  langauge → language

Change-Id: I960e5e8dc107f3f1d3eb59a5088f4fc73aa1b191
Merge "45 typo fixes"