docs: update variables

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

docs/user/FlowVariables.md

@@ -107,8 +107,8 @@ configuration file.
 | <a name="CELL_PAD_IN_SITES_GLOBAL_PLACEMENT"></a>CELL_PAD_IN_SITES_GLOBAL_PLACEMENT| Cell padding on both sides in site widths to ease routability during global placement.| 0|
 | <a name="CLKGATE_MAP_FILE"></a>CLKGATE_MAP_FILE| List of cells for gating clock treated as a black box by Yosys.| |
 | <a name="CORE_AREA"></a>CORE_AREA| The core area specified as a list of lower-left and upper-right corners in microns (X1 Y1 X2 Y2).| |
-| <a name="CORE_ASPECT_RATIO"></a>CORE_ASPECT_RATIO| The core aspect ratio (height / width). This value is ignored if `CORE_UTILIZATION` is undefined.| |
-| <a name="CORE_MARGIN"></a>CORE_MARGIN| The margin between the core area and die area, specified in microns. Allowed values are either one value for all margins or a set of four values, one for each margin. The order of the four values are: `{bottom top left right}`. This variable is ignored if `CORE_UTILIZATION` is undefined.| |
+| <a name="CORE_ASPECT_RATIO"></a>CORE_ASPECT_RATIO| The core aspect ratio (height / width). This value is ignored if `CORE_UTILIZATION` is undefined.| 1.0|
+| <a name="CORE_MARGIN"></a>CORE_MARGIN| The margin between the core area and die area, specified in microns. Allowed values are either one value for all margins or a set of four values, one for each margin. The order of the four values are: `{bottom top left right}`. This variable is ignored if `CORE_UTILIZATION` is undefined.| 1.0|
 | <a name="CORE_UTILIZATION"></a>CORE_UTILIZATION| The core utilization percentage (0-100).| |
 | <a name="CORNER"></a>CORNER| PVT corner library selection. Only available for ASAP7 and GF180 PDKs.| |
 | <a name="CTS_ARGS"></a>CTS_ARGS| Override `clock_tree_synthesis` arguments.| |