IsInt now recognises (possibly signed) integers such as "-5" or "+42",
making it slightly more permissive than TString::IsDigit(). A lone sign,
a double sign, or a sign following a digit are still rejected. strToNum
test expectations updated accordingly.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Stand-alone test under src/tests/strToNum exercising every PStringUtils
method (Split / IsInt / IsFloat / ToInt / ToDouble / IsEqualNoCase /
ContainsNoCase / BeginsWithNoCase). Three modes: built-in pass/fail
suite, ad-hoc inspection of command-line strings, and an interactive
prompt. Adds -h/--help and -i/--interactive options. Pure C++17, no
ROOT dependency.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
suter_a