sdn.1: improve wording about envvars
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sdn.1
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sdn.1
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@ -67,8 +67,8 @@ The viewer program to be launched by the F3 key binding as well as to show
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the internal help message. If none is set, it defaults to
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the internal help message. If none is set, it defaults to
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.Xr less 1 .
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.Xr less 1 .
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.It Ev VISUAL , Ev EDITOR
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.It Ev VISUAL , Ev EDITOR
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The editor program to be launched by the F4 key binding. If none is set,
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The editor program to be launched by the F4 key binding. If neither variable
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it defaults to
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is set, it defaults to
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.Xr vi 1 .
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.Xr vi 1 .
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.El
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.El
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.Sh FILES
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.Sh FILES
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