ezr.fix_colnames: Fix column names - replace spaces and periods
In jmp1989/easyr: Helpful wrappers for common EDA, Data Manipulation, & Modeling

Replace periods and spaces in column names with underscores

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ezr.fix_colnames(df_or_vector, return_as_name_vector = TRUE,
  periods2underscore = TRUE, spaces_to_underscore = TRUE,
  lowercase_all = TRUE, uppercase_all = FALSE)

`df_or_vector`	vector of things you want to change. C
`periods2underscore`	True means replace with underscore. False means removal.
`spaces_to_underscore`	True means replace with underscore. False means removal.
`lowercase_all`	Fix the case of the data...Make it all lowercase for ease of use
`uppercase_all`	Fix the case of the data...Make it all uppercase for ease of use