Editing Module:String2/doc (section)

=== hyphen2dash ===
Extracted hyphen_to_dash() function from [[Special:Permalink/1017669505|Module:Citation/CS1]].

Converts a hyphen to a dash under certain conditions.  The hyphen must separate like items; unlike items are returned unmodified.  These forms are modified:
* 	letter - letter (A - B)
* 	digit - digit (4-5)
* 	digit separator digit - digit separator digit (4.1-4.5 or 4-1-4-5)
* 	letterdigit - letterdigit (A1-A5) (an optional separator between letter and digit is supported – a.1-a.5 or a-1-a-5)
* 	digitletter - digitletter (5a - 5d) (an optional separator between letter and digit is supported – 5.a-5.d or 5-a-5-d)

Any other forms are returned unmodified.

The input string may be a comma- or semicolon-separated list. Semicolons are converted to commas.

<code><nowiki>{{</nowiki>#invoke:String2|hyphen2dash|1=1-2<nowiki>}}</nowiki></code> returns {{#invoke:String2|hyphen2dash|1=1-2}}.

<code><nowiki>{{</nowiki>#invoke:String2|hyphen2dash|1=1-2; 4–10<nowiki>}}</nowiki></code> returns {{#invoke:String2|hyphen2dash|1=1-2; 4–10}}.

[[Help:Citation Style 1#Accept-this-as-written markup|Accept-this-as-written markup]] is supported, e.g. <code><nowiki>{{</nowiki>#invoke:String2|hyphen2dash|1=((1-2)); 4–10<nowiki>}}</nowiki></code> returns {{#invoke:String2|hyphen2dash|1=((1-2)); 4–10}}.

By default, a normal space is inserted after the separating comma in lists. An optional second parameter allows to change this to a different character (i.e. a thin space or hair space).