WHO: Fix questionable description of the effect of +i (#219)

Author: progval

_includes/messages/user_queries.md

@@ -12,7 +12,7 @@ The mask can be one of the following:
 * An exact nickname, in which case a single user is returned.
 * A mask pattern, in which case all visible users whose nickname matches are listed. Servers MAY match other user-specific values, such as the hostname, server, real name or username. Servers MAY not support mask patterns and return an empty list.
 
-Visible users are users who aren't invisible ([user mode `+i`](#invisible-user-mode)) and who don't have a common channel with the requesting client.
+Visible users are users who either aren't invisible ([user mode `+i`](#invisible-user-mode)) or have a common channel with the requesting client.
 Servers MAY filter or limit visible users replies arbitrarily.
 
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