Misc. typos

Found via `codespell -q 3 --skip="./res/locales,./extlib"`

.appveyor/irc-notify.py

@@ -144,7 +144,7 @@ if __name__ == '__main__':
                 break
 
             elif response[0] == 'PING':
-                file.send('PONG {}\r\n'.format(reponse[1]).encode('utf_8'))
+                file.send('PONG {}\r\n'.format(response[1]).encode('utf_8'))
 
             elif response[1] == '433':
                 sock.send('NICK {}\r\n'.format(irc_nick).encode('utf_8'))

res/shaders/edge.frag

@@ -24,7 +24,7 @@ void main() {
     // calculate cap
     float dist = length(vec2(val * patternScale / (patternLen * width) + abs(fragLoc.x), fragLoc.y));
 
-    // perform antialising
+    // perform antialiasing
     float k = smoothstep(1.0 - 2.0 * feather * pixel / (width + feather * pixel), 1.0, abs(dist));
 
     // perform alpha-test

src/srf/ratpoly.cpp

@@ -425,7 +425,7 @@ void SSurface::ClosestPointTo(Vector p, Point2d *puv, bool mustConverge) {
 
 void SSurface::ClosestPointTo(Vector p, double *u, double *v, bool mustConverge) {
     // A few special cases first; when control points are coincident the
-    // derivative goes to zero at the conrol points, and would result in
+    // derivative goes to zero at the control points, and would result in
     // nonconvergence. We avoid that here, and also guarantee a consistent
     // (u, v) (of the infinitely many possible in one parameter).
     if(p.Equals(ctrl[0]   [0]   )) { *u = 0; *v = 0; return; }

src/ui.h

@@ -58,7 +58,7 @@ inline const char *C_(const char *msgctxt, const char *msgid) {
 }
 #endif
 
-// This table describes the top-level menus in the graphics winodw.
+// This table describes the top-level menus in the graphics window.
 enum class Command : uint32_t {
     NONE = 0,
     // File
@@ -291,7 +291,7 @@ public:
         GROUP_SCALE           = 3,
         GROUP_COLOR           = 4,
         GROUP_OPACITY         = 5,
-        // For the configuraiton screen
+        // For the configuration screen
         LIGHT_DIRECTION       = 100,
         LIGHT_INTENSITY       = 101,
         COLOR                 = 102,