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There are several commands that exist mostly for Emacs integration; although they may be used elsewhere,
they are not very useful or convenient without cmuscheme48
.
`,from-file filename' proclaims that the code following the command, until an ,end command, comes from filename — for example, this may be due to an appropriate Emacs command, such as C-c l in
cmuscheme48
—; if this is the first time the command processor has seen code from filename, it is registered to correspond with the interaction environment wherein the ,from-file command was used. If it is not the first time, the code is evaluated within the package that was registered for filename.