Minor typo and wording fixes
// NodeMCU supports two file systems: SPIFFS and FATFS, the first is available
-// on all ESP8266 modules. The latter requires extra H/W so is less common.
+// on all ESP8266 modules. The latter requires extra H/W so it is less common.
// If you use SPIFFS then there are a number of options which impact the
// RAM overhead and performance of the file system.
// GPIO_INTERRUPT_ENABLE needs to be defined if your application uses the
// gpio.trig() or related GPIO interrupt service routine code. Likewise the
-// GPIO interrupt hook is requited for a few modules such as rotary. If you
-// don't require this functionality, then commenting out these options out
+// GPIO interrupt hook is required for a few modules such as rotary. If you
+// don't require this functionality, then commenting out these options
// will remove any associated runtime overhead.
#define GPIO_INTERRUPT_ENABLE
#define I2C_MASTER_OLD_VERSION
-// The following sections are only relevent for those developers who are
+// The following sections are only relevant for those developers who are
// developing modules or core Lua changes and configure how extra diagnostics
// are enabled in the firmware. These should only be configured if you are
// building your own custom firmware and have full access to the firmware
