Name: read-line
Syntax: (read-line [filename])
Description: Reads a string from the keyboard or from and external file. The return value is the string that was typed in at the command line or read in from the file.
Example(s): (read-line)
"Read-line test"
(setq op-file (open "test.txt" "r"))
(read-line op-file)
"Hello World!"
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