Fix some ambigous typos

doxygen/doxygen.conf.in

@@ -1235,7 +1235,7 @@ FORMULA_TRANSPARENT    = YES
 USE_MATHJAX            = NO
 
 # When MathJax is enabled you can set the default output format to be used for
-# thA MathJax output. Supported types are HTML-CSS, NativeMML (i.e. MathML) and
+# the MathJax output. Supported types are HTML-CSS, NativeMML (i.e. MathML) and
 # SVG. The default value is HTML-CSS, which is slower, but has the best
 # compatibility.
 

src/modules/alsa/module-alsa-card.c

@@ -348,7 +348,7 @@ static pa_available_t calc_port_state(pa_device_port *p, struct userdata *u) {
             break;
           }
 
-          /* If the current availablility is unknown go the more precise no,
+          /* If the current availability is unknown go the more precise no,
            * but otherwise don't change state */
           if (pa == PA_AVAILABLE_UNKNOWN)
             pa = cpa;

src/modules/module-tunnel.c

@@ -1884,7 +1884,7 @@ static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t
 #ifdef TUNNEL_SINK
         pa_tagstruct_put_boolean(reply, false); /* volume_set */
 #endif
-        pa_tagstruct_put_boolean(reply, true); /* early rquests */
+        pa_tagstruct_put_boolean(reply, true); /* early requests */
     }
 
     if (u->version >= 15) {

src/pulsecore/filter/biquad.h

@@ -15,7 +15,7 @@ extern "C" {
  * are stored in x1 and x2, and the previous two outputs are stored in y1 and
  * y2.
  *
- * We use double during the coefficients calculation for better accurary, but
+ * We use double during the coefficients calculation for better accuracy, but
  * float is used during the actual filtering for faster computation.
  */
 struct biquad {