Cleanup: Fix various spelling errors

src/tests/mock_environment.h

@@ -13,7 +13,7 @@
 #include "mock_fontcache.h"
 #include "mock_spritecache.h"
 
-/** Singleton class to set up the mock environemnt once. */
+/** Singleton class to set up the mock environment once. */
 class MockEnvironment {
 public:
 	static MockEnvironment &Instance()

src/tests/string_func.cpp

@@ -431,7 +431,7 @@ static void ComposePart(std::back_insert_iterator<std::string> &output, const st
 	for (const auto &c : value) *output = c;
 }
 
-/* Helper to compose a string from unicde or string parts. */
+/* Helper to compose a string from unicode or string parts. */
 template <typename... Args>
 static std::string Compose(Args &&... args)
 {

src/tests/strings_func.cpp

@@ -45,7 +45,7 @@ TEST_CASE("HaveDParamChanged")
 	SetDParamStr(1, "some string");
 	CHECK(HaveDParamChanged(backup) == false);
 
-	/* Changing paramter 2 should not have any effect, as the backup is only 2 long. */
+	/* Changing parameter 2 should not have any effect, as the backup is only 2 long. */
 	SetDParam(2, 3);
 	CHECK(HaveDParamChanged(backup) == false);
 

src/tests/test_network_crypto.cpp

@@ -261,11 +261,11 @@ TEST_CASE("Encryption handling")
 	MockNetworkSocketHandler server_socket_handler(server.CreateClientToServerEncryptionHandler(), server.CreateServerToClientEncryptionHandler());
 	MockNetworkSocketHandler client_socket_handler(client.CreateServerToClientEncryptionHandler(), client.CreateClientToServerEncryptionHandler());
 
-	SECTION("Encyption happening client -> server") {
+	SECTION("Encryption happening client -> server") {
 		CheckEncryption(&client_socket_handler, &server_socket_handler);
 	}
 
-	SECTION("Encyption happening server -> client") {
+	SECTION("Encryption happening server -> client") {
 		CheckEncryption(&server_socket_handler, &client_socket_handler);
 	}