Measuring the string length is too long in pgm_textfile_generator

Description:
The current implementation of creating arrays or single remaining strings in the pgm_textfile_generator seems to produce slightly larger char arrays than expected. This issue is likely related to the insertion of additional escape characters. It is crucial to investigate and address this issue to ensure optimal memory usage and efficiency.

User Story:
As a developer, I expect the pgm_textfile_generator to create arrays or single remaining strings with accurate sizes, so that I can manage memory resources effectively and ensure the efficiency of the software