Doc updates

src/lay/lay/doc/about/drc_ref_drc.xml

@@ -55,7 +55,6 @@ The following global functions are relevant for the DRC expressions:
 <li><a href="/about/drc_ref_global.xml#length">length</a> </li>
 <li><a href="/about/drc_ref_global.xml#middle">middle</a> </li>
 <li><a href="/about/drc_ref_global.xml#notch">notch</a> </li>
-<li><a href="/about/drc_ref_global.xml#odd_polygons">odd_polygons</a> </li>
 <li><a href="/about/drc_ref_global.xml#outside">outside</a> </li>
 <li><a href="/about/drc_ref_global.xml#overlap">overlap</a> </li>
 <li><a href="/about/drc_ref_global.xml#overlapping">overlapping</a> </li>
@@ -140,7 +139,7 @@ CAUTION: be careful not to take secondary input for the
 first argument. This will not render the desired results.
 Remember that the "drc" function will walk over all primary
 shapes and present single primaries to the NOT operation together
-the the secondaries of that single shape. So when you use
+with the secondaries of that single shape. So when you use
 secondary shapes as the first argument, they will not see all
 all the primaries required to compute the correct result.
 That's also why a XOR operation cannot be provided in the 
@@ -166,7 +165,7 @@ axis in the mathematical sense.
 </p><p>
 For this measurement edges are considered without their direction and straight lines. 
 A horizontal edge has an angle of zero degree. A vertical one has
-an angle of 90 degee. The angle range is from -90 (exclusive) to 90 degree (inclusive).
+an angle of 90 degrees. The angle range is from -90 (exclusive) to 90 degree (inclusive).
 </p><p>
 If the input shapes are not polygons or edge pairs, they are converted to edges 
 before the angle test is made.
@@ -180,7 +179,7 @@ out = in.drc((primary.angle == 45) + (primary.angle == 135))    # equivalent
 </pre>
 </p><p>
 Note that angle checks usually imply the need to rotation variant formation as cells which
-are placed unrotated and rotated by 90 degree cannot be considered identical. This imposes
+are placed non-rotated and rotated by 90 degree cannot be considered identical. This imposes
 a performance penalty in hierarchical mode. If possible, consider using <a href="/about/drc_ref_drc.xml#rectilinear">DRC#rectilinear</a> for
 example to detect shapes with non-manhattan geometry instead of using angle checks.
 </p><p>
@@ -520,7 +519,7 @@ This method is basically equivalent to the <a href="#extended">extended</a> meth
 "extended(0, 0, dist, 0)".
 A version extending to the inside is <a href="#extended_in">extended_in</a>.
 </p>
-<a name="extent_refs"/><h2>"extent_refs" - Returns partial references to the boundings boxes of the polygons</h2>
+<a name="extent_refs"/><h2>"extent_refs" - Returns partial references to the bounding boxes of the polygons</h2>
 <keyword name="extent_refs"/>
 <p>Usage:</p>
 <ul>
@@ -684,20 +683,6 @@ The middle operation acts on polygons and has the same effect than <a href="/abo
 It takes the same arguments. It is available as a method on <a href="/about/drc_ref_drc.xml">DRC</a> expressions or
 as plain function, in which case it acts on the primary shapes.
 </p>
-<a name="odd_polygons"/><h2>"odd_polygons" - Selects all polygons which are non-orientable</h2>
-<keyword name="odd_polygons"/>
-<p>Usage:</p>
-<ul>
-<li><tt>expression.odd_polygons</tt></li>
-</ul>
-<p>
-Non-orientable polygons are for example "8"-shape polygons. Such polygons are
-usually considered harmful as their definition of covered area is depending on the
-wrap count rule in place.
-</p><p>
-This operation can be used as a plain function in which case it acts on primary
-shapes or can be used as method on another DRC expression.
-</p>
 <a name="outside"/><h2>"outside" - Selects shapes entirely outside other shapes</h2>
 <keyword name="outside"/>
 <p>Usage:</p>
@@ -860,7 +845,7 @@ The plain function is equivalent to "primary.bbox_aspect_ratio".
 <li><tt>expression.rounded_corners(inner, outer, n)</tt></li>
 </ul>
 <p>
-This operation acts on polygons and applies corner rounding the the given inner
+This operation acts on polygons and applies corner rounding to the given inner
 and outer corner radius and the number of points n per full circle. See <a href="/about/drc_ref_layer.xml#rounded_corners">Layer#rounded_corners</a> for more details.
 </p><p>
 The "rounded_corners" method is available as a plain function or as a method on <a href="/about/drc_ref_drc.xml">DRC</a> expressions.

src/lay/lay/doc/about/drc_ref_global.xml

@@ -349,7 +349,7 @@ output type option: "as_dots" for dot-like edges and "as_boxes" for
 small (2x2 DBU) box markers.
 </p><p>
 The "corners" operator can be put into a condition which means it's
-applied to coners meeting a particular angle constraint.
+applied to corners meeting a particular angle constraint.
 </p>
 <a name="covering"/><h2>"covering" - Selects shapes entirely covering other shapes</h2>
 <keyword name="covering"/>
@@ -1118,19 +1118,6 @@ See <a href="#enclosing">enclosing</a> for more details about the various ways t
 </tr>
 </table>
 </p>
-<a name="odd_polygons"/><h2>"odd_polygons" - Selects all polygons which are non-orientable</h2>
-<keyword name="odd_polygons"/>
-<p>Usage:</p>
-<ul>
-<li><tt>odd_polygons</tt></li>
-<li><tt>odd_polygons(layer)</tt></li>
-</ul>
-<p>
-This function can be used with a layer argument. In this case it
-is equivalent to "layer.odd_polygons" (see <a href="/about/drc_ref_layer.xml#odd_polygons">Layer#odd_polygons</a>). Without a layer
-argument, "odd_polygons" represents an odd polygon filter for primary shapes in 
-<a href="/about/drc_ref_drc.xml">DRC</a> expressions (see <a href="/about/drc_ref_layer.xml#drc">Layer#drc</a> and <a href="/about/drc_ref_drc.xml#odd_polygons">DRC#odd_polygons</a> for more details).
-</p>
 <a name="output"/><h2>"output" - Outputs a layer to the report database or output layout</h2>
 <keyword name="output"/>
 <p>Usage:</p>

src/lay/lay/doc/about/drc_ref_layer.xml

@@ -336,7 +336,7 @@ and methods to build an abstract definition of the operations to perform
 within the DRC.
 </p><p>
 When the DRC function is executed, it will basically visit all shapes
-from the input layer. This is the layer, the "drc" method is called on.
+from the input layer (the layer, the "drc" method is called on)).
 While it does, it collects the neighbor shapes from all involved other inputs 
 and runs the requested operations on each cluster. 
 Currently, "drc" is only available for polygon layers.
@@ -348,10 +348,10 @@ operation" or similar. This often can be achieved with conventional DRC function
 but involves potentially complex and heavy operations such as booleans, interact
 etc. For this reason, the "drc" function may provide a better performance.
 </p><p>
-In addition, within the loop a single shape from the input layer is presented to
+In addition, within the loop a single shape from the input layer is presented to the
 execution engine which runs the operations.
 This allows using operations such as "size" without having to consider 
-neigbor polygons growing into the area of the initial shape. In this sense,
+neighbor polygons growing into the area of the initial shape. In this sense,
 the "drc" function sees the layer as individual polygons rather than
 a global "sea of polygons". This enables new applications which are otherwise
 difficult to implement.
@@ -571,7 +571,7 @@ one input is a non-empty shape set ("if_any") or if all inputs are non-empty
 ("if_all"). 
 </p><p>
 For example, this will select all polygons which are rectangles
-and whose area is larger than 20 quare micrometers:
+and whose area is larger than 20 square micrometers:
 </p><p>
 <pre>
 out = in.drc(if_all(rectangles, area &gt; 20.0))