Per Tillisch

The Arduino IDE requires the use of a tab separator between the name and identifier. Without this tab the keyword is not highlighted. Reference: https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5:-Library-specification#keywords

The Arduino IDE requires the sketch folder name to match the filename of the primary sketch file. This change causes the example sketch to be accessible via the Arduino IDE's...

The Arduino IDE requires the use of a single true tab separator between the keyword name and identifier. When spaces are used rather than a true tab the keyword is...

Use correct separator in keywords.txt

1

The Arduino IDE requires the use of a tab separator between the name and identifier. Without this tab the keyword is not highlighted. Reference: https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5:-Library-specification#keywords

Specifying the library dependencies in the `depends` field of library.properties causes the Arduino Library Manager (Arduino IDE 1.8.10 and newer) to offer to install any missing dependencies during installation of...

Move example sketch to an appropriately named folder

1

The Arduino IDE requires sketches to be located in a folder with the same name as the sketch. This change will allow the example sketch to be accessed via the...

The Arduino IDE requires the use of a single true tab separator between the keyword name and identifier. When spaces are used rather than a true tab the keyword is...

The Arduino IDE requires the use of a single true tab separator between the keyword name and identifier. When spaces are used rather than a true tab the keyword is...

Each field of keywords.txt is separated by a single true tab. When you use multiple tabs it causes the field to be interpreted as empty. On Arduino IDE 1.6.5 and...

[The hardware](https://docs.arduino.cc/retired/shields/arduino-gsm-shield-2-integrated-antenna/) the library supports has not been manufactured for many years and is officially retired. The [library repository](https://github.com/arduino-libraries/GSM) was archived 2.5 years ago. --- Resolves https://github.com/arduino/library-registry/issues/4555