fix wrong if expression in link_tag
[ci skip] Manually apply an improved version of PR #3034 (doc fixes)
Merge pull request #3050 from emmanuelgrognet/develop

fix wrong if expression in link_tag
Fixed wrong url for Style Guide in Contributing Guide
Adjust docblock of load_class()

refs c26b9ebb00e29be2e972fece3bcf73d33249a64b
Merge pull request #3055 from ilatif/develop

Fixed wrong url for Style Guide in Contributing Guide
Merge pull request #3056 from vlakoff/docblock

Adjust docblock of load_class()
[ci skip] Add a note to CI_Model::__get() (issue #3046)
Simplify code in get_config()

Exact same behavior. The reference was just redundant.
Merge pull request #3053 from vlakoff/get_config

Simplify code in get_config()
Fix caching of MIME config

* in get_mimes(): was missing isset() test
* in Email->_mimes_types(): static cache of reference was noneffective

refs 6ef498b49946ba74d610b3805fb908b163a7f03a
Remove static cache in Email->_mimes_types()

Saving one function call isn't worth the code overhead.
Merge pull request #3052 from vlakoff/mime

Fix caching of MIME config
[ci skip] Fix error notices in FV when trying to lookup error msgs for closures
Regex fixes

* Replace wrong "wwww." with "www."
* Escape dot
Fix handling of {unwrap} tags in word_wrap() functions

* in Email library: these tags were not removed
* in text helper: simplified code
Pick up some changes from text helper

refs 6ce4746474ddf050f7f4df61b7a22b7f5854d533
Merge pull request #3058 from vlakoff/word_wrap

Fixes in word_wrap() functions
Update profiling.rst

There is some confusion about how to enable profiling for queries. This will save some time for devs who want to debug their generated SQL.
Update profiling.rst

correcting rst syntax