fixed typos in lua exception messages.

Author: agentzh

src/ngx_http_lua_regex.c

@@ -838,7 +838,7 @@ ngx_http_lua_ngx_re_gmatch_iterator(lua_State *L)
     }
 
     if (r != ctx->request || r->pool != ctx->request->pool) {
-        return luaL_error(L, "attemp to use ngx.re.gmatch iterator in a "
+        return luaL_error(L, "attempt to use ngx.re.gmatch iterator in a "
                 "request that did not create it");
     }
 

src/ngx_http_lua_shdict.c

@@ -592,7 +592,7 @@ ngx_http_lua_shdict_set_helper(lua_State *L, int flags)
     key.data = (u_char *) luaL_checklstring(L, 2, &key.len);
 
     if (key.len == 0) {
-        return luaL_error(L, "attemp to use empty keys");
+        return luaL_error(L, "attempt to use empty keys");
     }
 
     if (key.len > 65535) {
@@ -884,7 +884,7 @@ ngx_http_lua_shdict_incr(lua_State *L)
     key.data = (u_char *) luaL_checklstring(L, 2, &key.len);
 
     if (key.len == 0) {
-        return luaL_error(L, "attemp to use empty keys");
+        return luaL_error(L, "attempt to use empty keys");
     }
 
     if (key.len > 65535) {

src/ngx_http_lua_util.c

@@ -1773,7 +1773,7 @@ ngx_http_lua_process_args_option(ngx_http_request_t *r, lua_State *L,
     lua_pushnil(L);
     while (lua_next(L, table) != 0) {
         if (lua_type(L, -2) != LUA_TSTRING) {
-            luaL_error(L, "attemp to use a non-string key in the "
+            luaL_error(L, "attempt to use a non-string key in the "
                     "\"args\" option table");
             return;
         }