fix typos in documentation (#3097)

docs/debug.md

@@ -19,7 +19,7 @@ Tip: Debug commands are also supported in quick messages. If you need a debug co
 
 | Command | Description |
 | ------- | ----------- |
-| `+` | Executes a debug command when loading the first game. For exampel `+god` or `+changelevel 1 +spawn 4 skeleton`. |
+| `+` | Executes a debug command when loading the first game. For example `+god` or `+changelevel 1 +spawn 4 skeleton`. |
 | `-f` | Display frames per second. |
 | `-i` | Disable network timeout. |
 | `-n` | Disable startup video. |

docs/manual/platforms/gkd350h.md

@@ -32,7 +32,7 @@
 
 * Start and Select are swapped in this version because Start + D-Pad controls backlight on the GKD350h.
 * There is nothing to map mouse emulation to in this version because of this but it isn't necessary to play the game. Unfortunately, this also means that you can't move the automap.
-* This version looks uglier than on RG350 because it uses software scaling beacuse the IPU on the GKD350h doesn't work.
+* This version looks uglier than on RG350 because it uses software scaling because the IPU on the GKD350h doesn't work.
 
 Saves are compatible with PC saves from Diablo 1 and DevilutionX.
 

docs/manual/platforms/vita.md

@@ -49,6 +49,6 @@ sdl2_controller_mapping=50535669746120436f6e74726f6c6c65,PSVita Controller,y:b0,
 ```
 
 - **dpad_hotkeys:** dpad works as hotkeys without holding Start button
-- **switch_potions_and_clicks:** L1/R1 works as left/right mouse clicks by debault, and as health/mana potion while holding Select
+- **switch_potions_and_clicks:** L1/R1 works as left/right mouse clicks by default, and as health/mana potion while holding Select
 - **sdl2_controller_mapping:** allows you to remap controls. It uses https://github.com/gabomdq/SDL_GameControllerDB syntax
 - **enable_second_touchscreen:** enable/disable back touch mapping to L2/R2