Fixed error message typo

"protect you main loop" to "protect your main loop"
Merge pull request #3936 from sethdandridge/typofix

Fixed error message typo in joblib
FIX random state in isomap test
MAINT get rid of undefined variable warning in Liblinear
Allow list of strings for type_filter in all_estimators.
Merge pull request #3934 from amueller/common_test_slight_cleanup

MRG Allow list of strings for type_filter in all_estimators.
ENH Added method_filter to all_estimators function.

method_filter can be used to filter the estimators based on the existence of one or more methods passed as a list of method names.

The default method_filter value is None.

It can also be an empty list.
PEP8 Fix