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## Normalising spacing

`\normalsfcodes`

This command should be used to restore the normal settings of the parameters that affect spacing between words, sentences, etc.

An important use of this feature is to correct a problem, reported by Donald Arseneau, that punctuation in page headers has always (in all known TEX formats) been potentially wrong whenever a page break happens while a local setting of the space codes is in effect. These space codes are changed by, for example, the command `verb|`frenchspacing|) and the verbatim environment.

It is normally given the correct definition automatically in `\begin{document}` and so need not be explicitly set; however, if it is explicitly made nonempty in a class file then automatic default setting will be over-ridden.