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(web2c.info)Editor invocation

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Enter node , (file) or (file)node

Editor invocation
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  TeX, Metafont, and MetaPost all (by default) stop and ask for user
intervention at an error.  If the user responds with `e' or `E', the
program invokes an editor.

  Specifying `--with-editor=CMD' to `configure' sets the default editor
command string to CMD.  The environment variables/configuration values
`TEXEDIT', `MFEDIT', and `MPEDIT' (respectively) override this.  If
`--with-editor' is not specified, the default is `vi +%d %s'.

  In this string, `%d' is replaced by the line number of the error, and
`%s' is replaced by the name of the current input file.