Issue #2085989 by longwave: Correct mindless copy/paste error in SystemController docs
Issue #2083943 by Xano, InternetDevels, longwave: Fix spelling errors in various documentation
Issue #1969970 by Gábor Hojtsy: Add context information to documentation of Translation annotation
Issue #2073901 by xtfer, larowlan: document that entity_load now accepts a mixed argument for ID
Issue #2057131 by olli: Fix docs for lock wait function
Issue #2030713 by ifrik: Improve help for the email module