Replace em dashes with hyphens across docs and comments

src/printer/klipper.rs

@@ -17,7 +17,7 @@ impl GenericPrinter for KlipperPrinter {
         &self.base
     }
 
-    /// OVERRIDE: a third, again-different body — Moonraker's real feed is a
+    /// OVERRIDE: a third, again-different body - Moonraker's real feed is a
     /// WebSocket (see `adapters::moonraker`). This also shows the `Err`
     /// path: an empty `host` fails immediately, same as any other vendor
     /// would if it couldn't reach its printer.
@@ -29,7 +29,7 @@ impl GenericPrinter for KlipperPrinter {
         Ok(())
     }
 
-    /// OVERRIDE: Moonraker's own **hypothetical** native API, not gcode injection — no
+    /// OVERRIDE: Moonraker's own **hypothetical** native API, not gcode injection - no
     /// percent-to-PWM conversion needed since it already takes a
     /// percentage directly. Real version:
     /// `POST /printer/gcode/script?script=SET_FAN_SPEED SPEED=0.NN`.