Add typos config, CI

This is added to the existing CI in preparation for the upcoming
transition to the typical Linebender CI.

.github/workflows/main.yml

@@ -115,3 +115,12 @@ jobs:
 
     - name: Rust tests on PowerPC (big endian)
       run: cross test --target powerpc-unknown-linux-gnu
+
+  # If this fails, consider changing your text or adding something to .typos.toml.
+  typos:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: check typos
+        uses: crate-ci/[email protected]

.typos.toml

@@ -0,0 +1,32 @@
+# See the configuration reference at
+# https://github.com/crate-ci/typos/blob/master/docs/reference.md
+
+# Corrections take the form of a key/value pair. The key is the incorrect word
+# and the value is the correct word. If the key and value are the same, the
+# word is treated as always correct. If the value is an empty string, the word
+# is treated as always incorrect.
+
+# Match Identifier - Case Sensitive
+[default.extend-identifiers]
+ba = "ba"
+curr_iy = "curr_iy"
+flate2 = "flate2"
+iy = "iy"
+iy0 = "iy0"
+iy1 = "iy1"
+numer = "numer"
+numer_a = "numer_a"
+numer_b = "numer_b"
+PNGs = "PNGs"
+
+# Match Inside a Word - Case Insensitive
+[default.extend-words]
+
+[files]
+# Include .github, .cargo, etc.
+ignore-hidden = false
+extend-exclude = [
+    # /.git isn't in .gitignore, because git never tracks it.
+    # Typos doesn't know that, though.
+    "/.git",
+]

path/src/stroker.rs

@@ -1220,7 +1220,7 @@ impl PathStroker {
         if valid_divide {
             if intersect_ray_type == IntersectRayType::CtrlPt {
                 // the intersection of the tangents need not be on the tangent segment
-                // so 0 <= numerA <= 1 is not necessarily true
+                // so 0 <= numer_a <= 1 is not necessarily true
                 quad_points.quad[1].x =
                     start.x * (1.0 - numer_a) + quad_points.tangent_start.x * numer_a;
                 quad_points.quad[1].y =