tildify: add `tildify-space' and `tildify-mode'
* lisp/textmodes/tildify.el (tildify-space): A new function which can be used as a `post-self-insert-hook' to automatically convert spaces into hard spaces. (tildify-space-pattern): A new variable specifying pattern where `tildify-space' should take effect. (tildify-space-predicates): A new variable specifying list of predicate functions that all must return non-nil for `tildify-space' to take effect. (tildify-space-region-predicate): A new functions meant to be used as a predicate in `tildify-space-predicates' list. (tildify-mode): A new minor mode enabling `tildify-space' as a `post-self-insert-hook' * tests/automated/tildify-tests.el (tildify-space-test--test): A new helper function for testing `tildify-space' function. (tildify-space-test-html, tildify-space-test-html-nbsp) (tildify-space-test-xml, tildify-space-test-tex): New tests for `tildify-space' function.
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