[DOC] relative filename `Kernel#.require` and `Kernel#.load` [ci skip]

load.c

@@ -683,6 +683,7 @@ rb_load_protect(VALUE fname, int wrap, int *pstate)
  *  If the filename neither resolves to an absolute path nor starts with
  *  './' or '../', the file will be searched for in the library
  *  directories listed in <code>$LOAD_PATH</code> (<code>$:</code>).
+ *  If the filename starts with './' or '../', resolution is based on Dir.pwd.
  *
  *  If the optional _wrap_ parameter is +true+, the loaded script will
  *  be executed under an anonymous module, protecting the calling
@@ -789,6 +790,7 @@ load_unlock(const char *ftptr, int done)
  *  If the filename neither resolves to an absolute path nor starts with
  *  './' or '../', the file will be searched for in the library
  *  directories listed in <code>$LOAD_PATH</code> (<code>$:</code>).
+ *  If the filename starts with './' or '../', resolution is based on Dir.pwd.
  *
  *  If the filename has the extension ".rb", it is loaded as a source file; if
  *  the extension is ".so", ".o", or ".dll", or the default shared library