Add support to specify a mapping from the CLI

[ericcornelissen]

Add support to specify individual mappings from the CLI. This would make the tool useful in other scenarios as well, where e.g. you want to run it quickly to fix a common mistake you just discovered in your text files.

Proposal

This proposal is quite simple: add a new CLI argument that can be used to specify a single mapping. For example (--inline-mapping is just for illustration, I don't necessary like the name):

$ wordrow input.txt --inline-mapping cat,dog

# If spaces are wanted/needed, quotation marks are required
$ wordrow input.txt --inline-mapping "cat, dog"
$ wordrow input.txt --inline-mapping "hello world, hey planet"

To specify multiple inline mappings, the argument can simply be reused. For example:

$ wordrow input.txt --inline-mapping cat,dog --inline-mapping horse,donkey

Discussion

Alternative implementations

Another option is to take the two arguments following the --inline-mapping argument as the "from" and "to" value. Personally, I'm not a fan of this, as I think it doesn't read as clearly.

$ wordrow input.txt --inline-mapping cat dog