diff --git a/dmoj/checkers/_checker.c b/dmoj/checkers/_checker.c
index 5d3eaef1e..ab0bd6003 100644
--- a/dmoj/checkers/_checker.c
+++ b/dmoj/checkers/_checker.c
@@ -2,112 +2,106 @@
 
 #define UNREFERENCED_PARAMETER(p)
 #if defined(_MSC_VER)
-#	define inline __declspec(inline)
-#	pragma warning(disable: 4127)
-#	undef UNREFERENCED_PARAMETER
-#	define UNREFERENCED_PARAMETER(p) (p)
+#define inline __declspec(inline)
+#pragma warning(disable : 4127)
+#undef UNREFERENCED_PARAMETER
+#define UNREFERENCED_PARAMETER(p) (p)
 #elif !defined(__GNUC__)
-#	define inline
+#define inline
 #endif
 
 static inline int isline(char ch) {
-	switch (ch) {
-	case '\n':
-	case '\r':
-		return 1;
-	}
-	return 0;
+    switch (ch) {
+        case '\n':
+        case '\r':
+            return 1;
+    }
+    return 0;
 }
 
 static inline int iswhite(char ch) {
-	switch (ch) {
-	case ' ':
-	case '\t':
-	case '\v':
-	case '\f':
-	case '\n':
-	case '\r':
-		return 1;
-	}
-	return 0;
+    switch (ch) {
+        case ' ':
+        case '\t':
+        case '\v':
+        case '\f':
+        case '\n':
+        case '\r':
+            return 1;
+    }
+    return 0;
 }
 
 /* Increment *pos to the next non-whitespace character, and returns
  * 2 if a new line was seen, 1 if only spaces were seen, and 0 if no whitespace was seen */
 static inline int skip_spaces(const char *str, size_t *pos, size_t length) {
-	int saw_line = 0, saw_space = 0;
-	while (*pos < length) {
-		saw_line |= isline(str[*pos]);
-		if (!iswhite(str[*pos])) {
-			break;
-		}
-		++*pos;
-		saw_space = 1;
-	}
-	return saw_line ? 2 : saw_space;
+    int saw_line = 0, saw_space = 0;
+    while (*pos < length) {
+        saw_line |= isline(str[*pos]);
+        if (!iswhite(str[*pos])) {
+            break;
+        }
+        ++*pos;
+        saw_space = 1;
+    }
+    return saw_line ? 2 : saw_space;
 }
 
 static int check_standard(const char *judge, size_t jlen, const char *process, size_t plen) {
-	size_t j = 0, p = 0;
+    size_t j = 0, p = 0;
 
-	while (j < jlen && iswhite(judge[j])) ++j;
-	while (p < plen && iswhite(process[p])) ++p;
-	for (;;) {
-		int js = skip_spaces(judge, &j, jlen);
-		int ps = skip_spaces(process, &p, plen);
-		if (j == jlen || p == plen) return j == jlen && p == plen;
-		if (js != ps) return 0;
+    while (j < jlen && iswhite(judge[j]))
+        ++j;
+    while (p < plen && iswhite(process[p]))
+        ++p;
+    for (;;) {
+        int js = skip_spaces(judge, &j, jlen);
+        int ps = skip_spaces(process, &p, plen);
+        if (j == jlen || p == plen)
+            return j == jlen && p == plen;
+        if (js != ps)
+            return 0;
 
-		while (j < jlen && !iswhite(judge[j])) {
-			if (p >= plen) return 0;
-			if (judge[j++] != process[p++]) return 0;
-		}
-	}
+        while (j < jlen && !iswhite(judge[j])) {
+            if (p >= plen)
+                return 0;
+            if (judge[j++] != process[p++])
+                return 0;
+        }
+    }
 }
 
 static PyObject *checker_standard(PyObject *self, PyObject *args) {
-	PyObject *expected, *actual, *result;
+    PyObject *expected, *actual, *result;
 
-	UNREFERENCED_PARAMETER(self);
-	if (!PyArg_ParseTuple(args, "OO:standard", &expected, &actual))
-		return NULL;
+    UNREFERENCED_PARAMETER(self);
+    if (!PyArg_ParseTuple(args, "OO:standard", &expected, &actual))
+        return NULL;
 
-	if (!PyBytes_Check(expected) || !PyBytes_Check(actual)) {
-		PyErr_SetString(PyExc_ValueError, "expected strings");
-		return NULL;
-	}
+    if (!PyBytes_Check(expected) || !PyBytes_Check(actual)) {
+        PyErr_SetString(PyExc_ValueError, "expected strings");
+        return NULL;
+    }
 
-	Py_INCREF(expected);
-	Py_INCREF(actual);
-	Py_BEGIN_ALLOW_THREADS
-	result = check_standard(PyBytes_AsString(expected), PyBytes_Size(expected),
-							PyBytes_AsString(actual), PyBytes_Size(actual)) ?
-			Py_True : Py_False;
-	Py_END_ALLOW_THREADS
-	Py_DECREF(expected);
-	Py_DECREF(actual);
-	Py_INCREF(result);
-	return result;
+    Py_INCREF(expected);
+    Py_INCREF(actual);
+    Py_BEGIN_ALLOW_THREADS result = check_standard(PyBytes_AsString(expected), PyBytes_Size(expected),
+                                                   PyBytes_AsString(actual), PyBytes_Size(actual))
+                                        ? Py_True
+                                        : Py_False;
+    Py_END_ALLOW_THREADS Py_DECREF(expected);
+    Py_DECREF(actual);
+    Py_INCREF(result);
+    return result;
 }
 
-static PyMethodDef checker_methods[] = {
-	{"standard", checker_standard, METH_VARARGS,
-	 "Standard DMOJ checker."},
-	{NULL, NULL, 0, NULL}
-};
+static PyMethodDef checker_methods[] = { { "standard", checker_standard, METH_VARARGS, "Standard DMOJ checker." },
+                                         { NULL, NULL, 0, NULL } };
 
 static struct PyModuleDef moduledef = {
-        PyModuleDef_HEAD_INIT,
-        "_checker",
-        NULL,
-        -1,
-        checker_methods,
-        NULL,
-        NULL,
-        NULL,
-        NULL
+    PyModuleDef_HEAD_INIT, "_checker", NULL, -1, checker_methods, NULL, NULL, NULL, NULL
 };
 
 PyMODINIT_FUNC PyInit__checker(void) {
-	return PyModule_Create(&moduledef);
+    return PyModule_Create(&moduledef);
 }