[docs] [issue13868] Add hyphen doc fix

[Boštjan Mejak]

Boštjan Mejak <bostjan.mejak at gmail.com> added the comment:

If "floating point" in a sentence is in a role of an adjective, then it must be written as "floating-point" (with a hyphen), otherwise not.

Example: "The number 3.5 is a floating-point number."

Please consult some English orthography book and start writing correct English.

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