Move getplants issue details to user-facing docs

Ref #1479, #1481

docs/Plugins.rst

@@ -2283,6 +2283,16 @@ Options:
 Specifying both ``-t`` and ``-s`` will have no effect. If no plant IDs are specified,
 all valid plant IDs will be listed.
 
+.. note::
+
+    DF is capable of determining that a shrub has already been picked, leaving
+    an unusable structure part behind. This plugin does not perform such a check
+    (as the location of the required information has not yet been identified).
+    This leads to some shrubs being designated when they shouldn't be, causing a
+    plant gatherer to walk there and do nothing (except clearing the
+    designation). See :issue:`1479` for details.
+
+
 .. _infiniteSky:
 
 infiniteSky

plugins/getplants.cpp

@@ -1,9 +1,4 @@
 // (un)designate matching plants for gathering/cutting
-// Known issue:
-// DF is capable of determining that a shrub has already been picked, leaving an unusable structure part
-// behind. This code does not perform such a check (as the location of the required information is
-// unknown to the writer of this comment). This leads to some shrubs being designated when they
-// shouldn't be, causing a plant gatherer to walk there and do nothing (except clearing the designation).
 #include <set>
 
 #include "Core.h"