Trying to make an abbreviation using iabbrev <sc test iabbrev <lt>sc test iabbrev \<sc test iabbrev <lt><Char-115>c test iabbrev <script> <lt>sc test set cpoptions-=< iabbrev <sc test iabbrev <script> <sc test iabbrev <special> <lt>sc test Results in E474: Invalid argument at least on empty file. Strange, but it succeeds if I open a help window and define this abbreviation while being in it, though this abbreviation works only in help window.
Tested on vim-7.2.303, vim-7.2.444, vim-7.3a. Behavior in help window tested only on vim-7.2.303.
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