fix typo

src/db.c

@@ -90,7 +90,7 @@ robj *lookupKey(redisDb *db, robj *key, int flags) {
  *  LOOKUP_NONE (or zero): no special flags are passed.
  *  LOOKUP_NOTOUCH: don't alter the last access time of the key.
  *
- * Note: this function also returns NULL is the key is logically expired
+ * Note: this function also returns NULL if the key is logically expired
  * but still existing, in case this is a slave, since this API is called only
  * for read operations. Even if the key expiry is master-driven, we can
  * correctly report a key is expired on slaves even if the master is lagging

src/expire.c

@@ -112,7 +112,7 @@ void activeExpireCycle(int type) {
 
     if (type == ACTIVE_EXPIRE_CYCLE_FAST) {
         /* Don't start a fast cycle if the previous cycle did not exit
-         * for time limt. Also don't repeat a fast cycle for the same period
+         * for time limit. Also don't repeat a fast cycle for the same period
          * as the fast cycle total duration itself. */
         if (!timelimit_exit) return;
         if (start < last_fast_cycle + ACTIVE_EXPIRE_CYCLE_FAST_DURATION*2) return;

src/module.c

@@ -3399,7 +3399,7 @@ void RM_LogRaw(RedisModule *module, const char *levelstr, const char *fmt, va_li
  *
  * If the specified log level is invalid, verbose is used by default.
  * There is a fixed limit to the length of the log line this function is able
- * to emit, this limti is not specified but is guaranteed to be more than
+ * to emit, this limit is not specified but is guaranteed to be more than
  * a few lines of text.
  */
 void RM_Log(RedisModuleCtx *ctx, const char *levelstr, const char *fmt, ...) {

tests/unit/expire.tcl

@@ -121,7 +121,7 @@ start_server {tags {"expire"}} {
         list $a $b
     } {somevalue {}}
 
-    test {TTL returns tiem to live in seconds} {
+    test {TTL returns time to live in seconds} {
         r del x
         r setex x 10 somevalue
         set ttl [r ttl x]