Merge pull request 'while loop more efficient' (#2) from robyndrake/coreutils:main into main

Reviewed-on: https://codeberg.org/GRU/coreutils/pulls/2

src/echo.c

@@ -19,30 +19,30 @@ int main(int argc, char *argv[]) {
 	    				j++;
 	    			switch(argv[i][j]) {
 	    			case 'b':
-	      printf("\b");
+	      				putchar('\b');
 	      				break;
    	    			case 'c':
 	      				return 0;
 	    			case 'e':
-	      printf("\e");
+	      				putchar('\e');
 	      				break;
 	    			case 'f':
-	      printf("\f");
+	      				putchar('\f');
 				      break;
     	    		case 'n':
-	      printf("\n");
+	      				putchar('\n');
 						break;
     	    		case 'r':
-	      printf("\r");
+	      				putchar('\r');
 	      				break;
     	    		case 't':
-	      printf("\t");
+	      				putchar('\t');
 	      				break;
 	    			case 'v':
-	      printf("\v");
+	      				putchar('\v');
 	      				break;
 	    			case '\\':
-	      printf("\\");
+	      				putchar("\\");
 	      				break;
 	    			default:
 	      				printf("\\%c", argv[i][j]);
@@ -55,11 +55,11 @@ int main(int argc, char *argv[]) {
 			printf("%s", argv[i]);
 		}
 		if (i < argc - 1)
-	printf(" ");
+			putchar(' ');
     	}
   	}
   	if (newline) {
-    printf("\n");
+    	putchar('\n');
   	}
   	return 0;
 }