docs: Small fixes to layers.rst file.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

docs/rules/layers.rst

diff --git a/docs/rules/layers.rst b/docs/rules/layers.rst
index 464ee1f..01ca2b7 100644
--- a/docs/rules/layers.rst
+++ b/docs/rules/layers.rst
@@ -35,7 +35,7 @@
 
 .. csv-table:: Table F2b: Mask Generation table
    :file: layers/table-f2b-mask.tsv
-   :delim: "tab"
+   :delim: U+0009
    :header-rows: 1
    :stub-columns: 1
 
@@ -59,7 +59,7 @@
 
 .. csv-table:: Table F2a: Devices and Layout vs. Schematic (LVS)
    :file: layers/table-f2a-lvs.tsv
-   :delim: "tab"
+   :delim: U+0009
    :header-rows: 1
    :stub-columns: 1
 

docs/rules/layers/table-c4b-layer-description.csv

diff --git a/docs/rules/layers/table-c4b-layer-description.csv b/docs/rules/layers/table-c4b-layer-description.csv
index 77f884c..129dcf9 100644
--- a/docs/rules/layers/table-c4b-layer-description.csv
+++ b/docs/rules/layers/table-c4b-layer-description.csv
@@ -79,4 +79,4 @@
 natfet.dg {124:21},DEFETs,natfet.dg,"Add TUNM for SONOS channel implants. See SPR 117559, SGL-529",All,DRC/CLDRC
 areaid:lw,Ultra High voltage id layer, ,Areaid low voltage: UHV box to put all HV/LV curcuits in,All,Analog
 "* To distinguish the layers, the full name of the layer needs to be turned on in the LSW window",,,,,
-"As the layers are displayed in LSW window in icfb version 5.0; For purpose layer displayed in version 5.1, pls refer table C3"
+"As the layers are displayed in LSW window in icfb version 5.0; For purpose layer displayed in version 5.1, pls refer table C3",,,,,