| alter_description_file | R Documentation | 
Substitutes and/or adds fields in a DESCRIPTION file.
alter_description_file(path, substitution = NULL, addition = NULL)
| path | Path to the DESCRIPTION file or the directory containing it. | 
| substitution | A list of named character vector giving the pairs for substitution. | 
| addition | A list of named character vector giving the pairs for addition. | 
value of write.dcf.
Adding NULL elements (Title = NULL, for example) to substitution
does not delete or overwrite the entry in the DESCRIPTION file. 
alter_description_file() is deprecated, please use CRAN package
desc.
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