tests: Fix a regression in the placement rendering.

One is a real bug introduced by some ruled.client changes which
cause the clients to be moved twice in the first loop. This needs
fixing, but is mitigated for the doc.

The other is mostly fixed in the last commit and was a shim bug.

tests/examples/awful/placement/align.lua

@@ -7,7 +7,7 @@ for _, pos in ipairs{
     "left", "right", "top", "bottom", "centered",
 } do
 local c1 = client.gen_fake {x = 80, y = 55, width=75, height=50}
-c1:_hide()
+c1:_hide_all()
 placement.align(client.focus, {position = pos, honor_workarea=true})
 c1:set_label(pos)
 end

tests/examples/awful/placement/maximize.lua

@@ -10,6 +10,7 @@ for k, pos in ipairs{ --DOC_HIDE
 local c1 = client.gen_fake {--DOC_HIDE
     x = screen[k].geometry.x+40, --DOC_HIDE
     y = screen[k].geometry.y+40, width=75, height=50, screen=screen[k]} --DOC_HIDE
+    c1:_hide_all() --DOC_HIDE
     placement.maximize(c1, {axis = pos ~= "" and pos or nil}) --DOC_HIDE
 
     if k == 1 then --DOC_HIDE

tests/examples/awful/placement/maximize_horizontally.lua

@@ -8,6 +8,7 @@ screen[1]._resize {width = 128, height = 96} --DOC_HIDE
 local placement = require("awful.placement") --DOC_HIDE
 
 local c = client.gen_fake {x = 45, y = 35, width=40, height=30} --DOC_HIDE
+c:_hide_all() --DOC_HIDE
 placement.maximize_horizontally(c)
 
 assert(c.width + 2*c.border_width == screen[1].geometry.width) --DOC_HIDE

tests/examples/awful/placement/maximize_vertically.lua

@@ -8,6 +8,7 @@ screen[1]._resize {width = 128, height = 96} --DOC_HIDE
 local placement = require("awful.placement") --DOC_HIDE
 
 local c = client.gen_fake {x = 45, y = 35, width=40, height=30} --DOC_HIDE
+c:_hide_all() --DOC_HIDE
 placement.maximize_vertically(c)
 
 assert(c.height+2*c.border_width == screen[1].geometry.height)--DOC_HIDE

tests/examples/awful/placement/next_to.lua

@@ -3,14 +3,14 @@ local awful = { placement = require("awful.placement") }--DOC_HIDE
 screen[1]._resize {x= 0, width = 640, height=200} --DOC_HIDE
 
 local parent_client = client.gen_fake {x = 0, y = 0, width=350, height=70} --DOC_HIDE
-parent_client:_hide() --DOC_HIDE
+parent_client:_hide_all() --DOC_HIDE
 awful.placement.centered(client.focus) --DOC_HIDE
 parent_client:set_label("Parent client") --DOC_HIDE
 
 for _, pos in ipairs{"left", "right", "top", "bottom"} do
     for _, anchor in ipairs{"front", "middle", "back"} do
         local c1 = client.gen_fake {x = 0, y = 0, width=80, height=20} --DOC_HIDE
-        c1:_hide() --DOC_HIDE
+        c1:_hide_all() --DOC_HIDE
         local _,p,a = --DOC_HIDE
         awful.placement.next_to(
             client.focus,