Freeciv

"Quiet" field does not appear properly documented (2.6) in the readme.effects.

Specifically, it gives an example, but does not explain it.

The effects.ruleset file contains all effects in play in a Freeciv scenario. 

They have the following form (this is perhaps the most complicated example I 

could find):

[effect_hydro_plant]

type  = "Output_Bonus" 

value = 25

reqs  =

    { "type", "name", "range", "present", "quiet" 

      "Building", "Factory", "City", TRUE, FALSE

      "Building", "Hydro Plant", "City", TRUE, FALSE

      "OutputType", "Shield", "Local", TRUE, TRUE

      "Building", "Hoover Dam", "Player", FALSE, FALSE

      "Building", "Nuclear Plant", "City", FALSE, FALSE

    }

The text in the brackets is the entry name, which just has to be unique, but 

is otherwise not used. The type field tells Freeciv which effect you are

defining.  The value is the effect's value, which depends on which effect it 

is. The reqs table contain a list of requirements for this effect being in 

effect. You need to satisfy all requirements listed here for this effect to 

take effect in the game. Requirements with present = TRUE must be present,

those with present = FALSE must not be present.

Value is integral amount parameter for many effects (must be in the range 

-32767 to 32767).

Requirement range may be one of: "None", "Local",

"CAdjacent" (Cardinally Adjacent), "Adjacent", "City", 

"Continent", "Player", "Allied, "World". Some requirement types may only work at 

certain ranges; this is not yet documented. In particular, at present, 

"Continent" effects can affect only cities and units in cities.

A requirement may have a 'survives' field, and if this 'TRUE', the effect

survives destruction. This is supported for only a few conditions and

ranges: wonders (at world or player range), nations, and advances

(both at world range only).

A requirement may have a 'present' field, and if this is 'FALSE',

the requirement is negated (the condition must not be true for the req to be

met).

"Quiet" should also have a similar paragraph to "Survives" and "Present", starting with:

A requirement may have a 'quiet' field, and if this is 'TRUE',
the requirement (exact details)

http://www.hostedredmine.com/projects/freeciv/repository/revisions/32545 describes it thusly:
Added requirement property 'quiet' that can be used to suppress automatic help generation
from adding information about them.

So would the description paragraph be this? Example:
A requirement may have a 'quiet' field, and if this is 'TRUE',
the requirement property suppresses the automatic help
generation from adding information about them.