Merge pull request #26 from quartiq/doc

biquad: fix doc link

.github/workflows/ci.yml

@@ -53,3 +53,27 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: bench
+
+  doc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - uses: Swatinem/rust-cache@v1
+      - uses: actions-rs/cargo@v1
+        with:
+          command: install
+          args: |
+            cargo-deadlinks
+      - name: cargo doc
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: --no-deps
+      - name: cargo deadlinks
+        uses: actions-rs/cargo@v1
+        with:
+          command: deadlinks
+          args: --ignore-fragments --check-intra-doc-links

src/iir/biquad.rs

@@ -213,7 +213,7 @@ impl<T: Coefficient> Biquad<T> {
     /// Filter coefficients
     ///
     /// IIR filter tap gains (`ba`) are an array `[b0, b1, b2, a1, a2]` such that
-    /// [`Biquad::update(&mut xy, x0)`] returns
+    /// [`Biquad::update()`] returns
     /// `y0 = clamp(b0*x0 + b1*x1 + b2*x2 - a1*y1 - a2*y2 + u, min, max)`.
     ///
     /// ```